diff --git a/CHROMIUM_BUILD_COMPATIBILITY.txt b/CHROMIUM_BUILD_COMPATIBILITY.txt
index 9d345e915..d275e9e53 100644
--- a/CHROMIUM_BUILD_COMPATIBILITY.txt
+++ b/CHROMIUM_BUILD_COMPATIBILITY.txt
@@ -7,5 +7,5 @@
 # https://bitbucket.org/chromiumembedded/cef/wiki/BranchesAndBuilding
 
 {
-  'chromium_checkout': 'refs/tags/77.0.3865.0'
+  'chromium_checkout': 'refs/tags/77.0.3865.56'
 }
diff --git a/libcef/browser/osr/render_widget_host_view_osr.cc b/libcef/browser/osr/render_widget_host_view_osr.cc
index c61a1f896..9172878fa 100644
--- a/libcef/browser/osr/render_widget_host_view_osr.cc
+++ b/libcef/browser/osr/render_widget_host_view_osr.cc
@@ -259,7 +259,8 @@ CefRenderWidgetHostViewOSR::~CefRenderWidgetHostViewOSR() {
   // Marking the DelegatedFrameHost as removed from the window hierarchy is
   // necessary to remove all connections to its old ui::Compositor.
   if (is_showing_)
-    delegated_frame_host_->WasHidden();
+    delegated_frame_host_->WasHidden(
+        content::DelegatedFrameHost::HiddenCause::kOther);
   delegated_frame_host_->DetachFromCompositor();
 
   delegated_frame_host_.reset(nullptr);
@@ -347,7 +348,8 @@ void CefRenderWidgetHostViewOSR::Hide() {
   if (render_widget_host_)
     render_widget_host_->WasHidden();
 
-  GetDelegatedFrameHost()->WasHidden();
+  GetDelegatedFrameHost()->WasHidden(
+      content::DelegatedFrameHost::HiddenCause::kOther);
   GetDelegatedFrameHost()->DetachFromCompositor();
 }
 
diff --git a/patch/patches/browser_compositor_mac.patch b/patch/patches/browser_compositor_mac.patch
index 546271ffc..d9a7d5765 100644
--- a/patch/patches/browser_compositor_mac.patch
+++ b/patch/patches/browser_compositor_mac.patch
@@ -12,7 +12,7 @@ index de89d291e5cb..9ce7bf4cb250 100644
    // Force a new surface id to be allocated. Returns true if the
    // RenderWidgetHostImpl sent the resulting surface id to the renderer.
 diff --git content/browser/renderer_host/browser_compositor_view_mac.mm content/browser/renderer_host/browser_compositor_view_mac.mm
-index 4b3f3c7e97e7..0ce693402b99 100644
+index 8ddd790decc4..3ffd3db8da4b 100644
 --- content/browser/renderer_host/browser_compositor_view_mac.mm
 +++ content/browser/renderer_host/browser_compositor_view_mac.mm
 @@ -85,6 +85,12 @@ DelegatedFrameHost* BrowserCompositorMac::GetDelegatedFrameHost() {
diff --git a/patch/patches/browser_plugin_guest_1565.patch b/patch/patches/browser_plugin_guest_1565.patch
index 01116777b..0f2b13ea2 100644
--- a/patch/patches/browser_plugin_guest_1565.patch
+++ b/patch/patches/browser_plugin_guest_1565.patch
@@ -79,7 +79,7 @@ index bfb918a2cba3..a193b5a0fed8 100644
    // Creates a new View that holds a non-top-level widget and receives messages
    // for it.
 diff --git content/browser/web_contents/web_contents_view_aura.cc content/browser/web_contents/web_contents_view_aura.cc
-index ab27502c3509..282985c05c45 100644
+index 68f268efe02e..55c9473895e9 100644
 --- content/browser/web_contents/web_contents_view_aura.cc
 +++ content/browser/web_contents/web_contents_view_aura.cc
 @@ -947,7 +947,8 @@ void WebContentsViewAura::CreateView(const gfx::Size& initial_size,
@@ -101,7 +101,7 @@ index ab27502c3509..282985c05c45 100644
        g_create_render_widget_host_view
            ? g_create_render_widget_host_view(render_widget_host,
 diff --git content/browser/web_contents/web_contents_view_aura.h content/browser/web_contents/web_contents_view_aura.h
-index 9be20d50ba4b..84c5106d15f2 100644
+index ed3c8d86cacc..70f869da762f 100644
 --- content/browser/web_contents/web_contents_view_aura.h
 +++ content/browser/web_contents/web_contents_view_aura.h
 @@ -122,7 +122,7 @@ class CONTENT_EXPORT WebContentsViewAura
diff --git a/patch/patches/chrome_browser.patch b/patch/patches/chrome_browser.patch
index 2a4ad9bb4..3bb032298 100644
--- a/patch/patches/chrome_browser.patch
+++ b/patch/patches/chrome_browser.patch
@@ -1,5 +1,5 @@
 diff --git chrome/browser/BUILD.gn chrome/browser/BUILD.gn
-index 8ce5e842bbb2..95b0356cab27 100644
+index c00a09a5ec2b..5596693cc879 100644
 --- chrome/browser/BUILD.gn
 +++ chrome/browser/BUILD.gn
 @@ -9,6 +9,7 @@ import("//build/config/jumbo.gni")
diff --git a/patch/patches/chrome_browser_net_export.patch b/patch/patches/chrome_browser_net_export.patch
index 3c6df5542..bc7faaa9c 100644
--- a/patch/patches/chrome_browser_net_export.patch
+++ b/patch/patches/chrome_browser_net_export.patch
@@ -1,5 +1,5 @@
 diff --git chrome/browser/ui/BUILD.gn chrome/browser/ui/BUILD.gn
-index 50f7329cca40..c6cae9beda15 100644
+index 3ec0ed426c79..7ffad26a95a3 100644
 --- chrome/browser/ui/BUILD.gn
 +++ chrome/browser/ui/BUILD.gn
 @@ -10,6 +10,7 @@ import("//build/config/jumbo.gni")
diff --git a/patch/patches/content_2015.patch b/patch/patches/content_2015.patch
index 9013e2c97..4a3a2d726 100644
--- a/patch/patches/content_2015.patch
+++ b/patch/patches/content_2015.patch
@@ -1,8 +1,8 @@
 diff --git chrome/browser/download/download_target_determiner.cc chrome/browser/download/download_target_determiner.cc
-index e0d2c5c42517..0849c5bf6b7e 100644
+index bf1ca3fd565b..7e758b4da15c 100644
 --- chrome/browser/download/download_target_determiner.cc
 +++ chrome/browser/download/download_target_determiner.cc
-@@ -631,8 +631,8 @@ void IsHandledBySafePlugin(content::ResourceContext* resource_context,
+@@ -630,8 +630,8 @@ void IsHandledBySafePlugin(content::ResourceContext* resource_context,
    content::PluginService* plugin_service =
        content::PluginService::GetInstance();
    bool plugin_found = plugin_service->GetPluginInfo(
@@ -129,7 +129,7 @@ index b0458c1168d9..98f7ae7b7899 100644
    if (stale) {
      // Refresh the plugins asynchronously.
 diff --git content/browser/loader/navigation_url_loader_impl.cc content/browser/loader/navigation_url_loader_impl.cc
-index 7dafa5c27290..14d97d465f2c 100644
+index 8a5502430547..689f5dbfe4a6 100644
 --- content/browser/loader/navigation_url_loader_impl.cc
 +++ content/browser/loader/navigation_url_loader_impl.cc
 @@ -1061,6 +1061,13 @@ class NavigationURLLoaderImpl::URLLoaderRequestController
@@ -373,10 +373,10 @@ index 0e2e86e6a2af..b44e90f69263 100644
    virtual void FocusedElementChanged(const blink::WebElement& element) {}
  
 diff --git content/renderer/render_frame_impl.cc content/renderer/render_frame_impl.cc
-index e2a9d4a370f3..2919772fef77 100644
+index 01b1d995c656..31bfea00ca60 100644
 --- content/renderer/render_frame_impl.cc
 +++ content/renderer/render_frame_impl.cc
-@@ -4095,7 +4095,8 @@ blink::WebPlugin* RenderFrameImpl::CreatePlugin(
+@@ -4118,7 +4118,8 @@ blink::WebPlugin* RenderFrameImpl::CreatePlugin(
    std::string mime_type;
    bool found = false;
    Send(new FrameHostMsg_GetPluginInfo(
@@ -386,7 +386,7 @@ index e2a9d4a370f3..2919772fef77 100644
        params.mime_type.Utf8(), &found, &info, &mime_type));
    if (!found)
      return nullptr;
-@@ -4510,6 +4511,8 @@ void RenderFrameImpl::FrameDetached(DetachType type) {
+@@ -4533,6 +4534,8 @@ void RenderFrameImpl::FrameDetached(DetachType type) {
  
  void RenderFrameImpl::FrameFocused() {
    Send(new FrameHostMsg_FrameFocused(routing_id_));
diff --git a/patch/patches/linux_gtk_2014.patch b/patch/patches/linux_gtk_2014.patch
index 1ed311970..551ab9776 100644
--- a/patch/patches/linux_gtk_2014.patch
+++ b/patch/patches/linux_gtk_2014.patch
@@ -39,10 +39,10 @@ index 07f06ac694f5..831fd9f82dbe 100644
  
  void ChromeBrowserMainExtraPartsViewsLinux::ToolkitInitialized() {
 diff --git chrome/test/BUILD.gn chrome/test/BUILD.gn
-index f60af132bcdd..626c0081b78a 100644
+index 39a8fc308408..8097a58a5fe1 100644
 --- chrome/test/BUILD.gn
 +++ chrome/test/BUILD.gn
-@@ -4457,7 +4457,7 @@ test("unit_tests") {
+@@ -4461,7 +4461,7 @@ test("unit_tests") {
    if (use_gio) {
      configs += [ "//build/linux:gio_config" ]
    }
@@ -51,7 +51,7 @@ index f60af132bcdd..626c0081b78a 100644
      deps += [ "//chrome/browser/ui/libgtkui" ]
    }
  
-@@ -5471,7 +5471,7 @@ if (!is_android) {
+@@ -5475,7 +5475,7 @@ if (!is_android) {
            # suites, it seems like one or another starts timing out too.
            "../browser/ui/views/keyboard_access_browsertest.cc",
          ]
diff --git a/patch/patches/rwh_background_color_1984.patch b/patch/patches/rwh_background_color_1984.patch
index d5c3da1cf..d6ec7263b 100644
--- a/patch/patches/rwh_background_color_1984.patch
+++ b/patch/patches/rwh_background_color_1984.patch
@@ -1,8 +1,8 @@
 diff --git content/browser/renderer_host/render_widget_host_view_aura.cc content/browser/renderer_host/render_widget_host_view_aura.cc
-index 7bea1b72e4d0..a0c6c00d48a7 100644
+index d51ce884a964..87a029e2bf60 100644
 --- content/browser/renderer_host/render_widget_host_view_aura.cc
 +++ content/browser/renderer_host/render_widget_host_view_aura.cc
-@@ -696,10 +696,12 @@ gfx::Rect RenderWidgetHostViewAura::GetViewBounds() {
+@@ -711,10 +711,12 @@ gfx::Rect RenderWidgetHostViewAura::GetViewBounds() {
  void RenderWidgetHostViewAura::UpdateBackgroundColor() {
    DCHECK(GetBackgroundColor());
  
@@ -19,7 +19,7 @@ index 7bea1b72e4d0..a0c6c00d48a7 100644
  }
  
  void RenderWidgetHostViewAura::WindowTitleChanged() {
-@@ -2024,6 +2026,15 @@ void RenderWidgetHostViewAura::CreateAuraWindow(aura::client::WindowType type) {
+@@ -2039,6 +2041,15 @@ void RenderWidgetHostViewAura::CreateAuraWindow(aura::client::WindowType type) {
    // Init(), because it needs to have the layer.
    if (frame_sink_id_.is_valid())
      window_->SetEmbedFrameSinkId(frame_sink_id_);
diff --git a/patch/patches/views_1749_2102.patch b/patch/patches/views_1749_2102.patch
index f553da490..386915b4a 100644
--- a/patch/patches/views_1749_2102.patch
+++ b/patch/patches/views_1749_2102.patch
@@ -230,7 +230,7 @@ index ce169b164bc7..743509aa6acb 100644
    std::unique_ptr<SelectionController> selection_controller_;
  
 diff --git ui/views/controls/menu/menu_controller.cc ui/views/controls/menu/menu_controller.cc
-index 354216cafea8..16ec7b4c4c3f 100644
+index bceec6f17210..93476578a48a 100644
 --- ui/views/controls/menu/menu_controller.cc
 +++ ui/views/controls/menu/menu_controller.cc
 @@ -2571,8 +2571,13 @@ MenuItemView* MenuController::FindNextSelectableMenuItem(
@@ -472,7 +472,7 @@ index 4f865802a6e9..42d047bd68ad 100644
        // Move the cursor because EnterNotify/LeaveNotify are generated with the
        // current mouse position as a result of XGrabPointer()
 diff --git ui/views/view.h ui/views/view.h
-index a4f2ba254fb0..8d76cfa46fa6 100644
+index 75eecfb67d0a..d93bf32ffe66 100644
 --- ui/views/view.h
 +++ ui/views/view.h
 @@ -22,6 +22,7 @@
diff --git a/patch/patches/views_widget_180_1481_1565_1677_1749.patch b/patch/patches/views_widget_180_1481_1565_1677_1749.patch
index 4ddedc0d2..2255a18c1 100644
--- a/patch/patches/views_widget_180_1481_1565_1677_1749.patch
+++ b/patch/patches/views_widget_180_1481_1565_1677_1749.patch
@@ -173,7 +173,7 @@ index 70553b153c44..ecd99bc78373 100644
    return host ? host->GetAcceleratedWidget() : nullptr;
  }
 diff --git ui/views/widget/desktop_aura/desktop_window_tree_host_win.cc ui/views/widget/desktop_aura/desktop_window_tree_host_win.cc
-index 7e31a1c159af..eb0451b8913a 100644
+index 0eedc2665313..53492f79fe17 100644
 --- ui/views/widget/desktop_aura/desktop_window_tree_host_win.cc
 +++ ui/views/widget/desktop_aura/desktop_window_tree_host_win.cc
 @@ -95,6 +95,7 @@ DesktopWindowTreeHostWin::DesktopWindowTreeHostWin(
@@ -198,7 +198,7 @@ index 7e31a1c159af..eb0451b8913a 100644
  
    remove_standard_frame_ = params.remove_standard_frame;
    has_non_client_view_ = Widget::RequiresNonClientView(params.type);
-@@ -891,11 +896,15 @@ void DesktopWindowTreeHostWin::HandleFrameChanged() {
+@@ -900,11 +905,15 @@ void DesktopWindowTreeHostWin::HandleFrameChanged() {
  }
  
  void DesktopWindowTreeHostWin::HandleNativeFocus(HWND last_focused_window) {
@@ -232,7 +232,7 @@ index 335db0db49bb..7f60402ed086 100644
    // a reference.
    corewm::TooltipWin* tooltip_;
 diff --git ui/views/widget/desktop_aura/desktop_window_tree_host_x11.cc ui/views/widget/desktop_aura/desktop_window_tree_host_x11.cc
-index b03a5bc9d509..bcbf960a130e 100644
+index 7c4f1e88e422..c21c8b24ba54 100644
 --- ui/views/widget/desktop_aura/desktop_window_tree_host_x11.cc
 +++ ui/views/widget/desktop_aura/desktop_window_tree_host_x11.cc
 @@ -139,6 +139,7 @@ ui::XWindow::Configuration ConvertInitParamsToX11WindowConfig(
@@ -261,7 +261,7 @@ index b03a5bc9d509..bcbf960a130e 100644
    gfx::Rect bounds_in_pixels = x11_window_->bounds();
    return ToDIPRect(bounds_in_pixels);
  }
-@@ -954,6 +959,9 @@ void DesktopWindowTreeHostX11::SetBoundsInPixels(
+@@ -955,6 +960,9 @@ void DesktopWindowTreeHostX11::SetBoundsInPixels(
  }
  
  gfx::Point DesktopWindowTreeHostX11::GetLocationOnScreenInPixels() const {
@@ -271,7 +271,7 @@ index b03a5bc9d509..bcbf960a130e 100644
    return x11_window_->bounds().origin();
  }
  
-@@ -1280,6 +1288,11 @@ void DesktopWindowTreeHostX11::InitX11Window(const Widget::InitParams& params) {
+@@ -1281,6 +1289,11 @@ void DesktopWindowTreeHostX11::InitX11Window(const Widget::InitParams& params) {
    config.background_color = background_color;
    config.prefer_dark_theme = linux_ui && linux_ui->PreferDarkTheme();
    config.icon = ViewsDelegate::GetInstance()->GetDefaultWindowIcon();
@@ -407,10 +407,10 @@ index 9edfa2c00c4b..8a9217578609 100644
        if (native_widget_delegate->IsDialogBox()) {
          *style |= DS_MODALFRAME;
 diff --git ui/views/win/hwnd_message_handler.cc ui/views/win/hwnd_message_handler.cc
-index 9b683f301913..8609f61ebd0f 100644
+index 4d674d15da3a..e7cb3a733823 100644
 --- ui/views/win/hwnd_message_handler.cc
 +++ ui/views/win/hwnd_message_handler.cc
-@@ -2963,10 +2963,13 @@ LRESULT HWNDMessageHandler::HandleMouseEventInternal(UINT message,
+@@ -2967,10 +2967,13 @@ LRESULT HWNDMessageHandler::HandleMouseEventInternal(UINT message,
    } else if (event.type() == ui::ET_MOUSEWHEEL) {
      ui::MouseWheelEvent mouse_wheel_event(msg);
      // Reroute the mouse wheel to the window under the pointer if applicable.
diff --git a/patch/patches/viz_osr_2575.patch b/patch/patches/viz_osr_2575.patch
index 072a267db..e92bc9a2d 100644
--- a/patch/patches/viz_osr_2575.patch
+++ b/patch/patches/viz_osr_2575.patch
@@ -80,7 +80,7 @@ index d9a9730a78b9..d98426e9f789 100644
   private:
    const HWND hwnd_;
 diff --git components/viz/service/BUILD.gn components/viz/service/BUILD.gn
-index fdd358f741e6..57afa1d3855e 100644
+index 16ef26aa4816..5986062f73b4 100644
 --- components/viz/service/BUILD.gn
 +++ components/viz/service/BUILD.gn
 @@ -13,6 +13,8 @@ config("viz_service_implementation") {
diff --git a/patch/patches/web_contents_1257_1565.patch b/patch/patches/web_contents_1257_1565.patch
index 3a69708de..620a887b0 100644
--- a/patch/patches/web_contents_1257_1565.patch
+++ b/patch/patches/web_contents_1257_1565.patch
@@ -1,5 +1,5 @@
 diff --git content/browser/web_contents/web_contents_impl.cc content/browser/web_contents/web_contents_impl.cc
-index ae1bcfa7db7d..0ff65dcfe38f 100644
+index 21cac3c4da2a..a612822d5d57 100644
 --- content/browser/web_contents/web_contents_impl.cc
 +++ content/browser/web_contents/web_contents_impl.cc
 @@ -2131,21 +2131,30 @@ void WebContentsImpl::Init(const WebContents::CreateParams& params) {
@@ -95,7 +95,7 @@ index df508da0aef2..f6f4bf42b108 100644
  WebContents::CreateParams::CreateParams(const CreateParams& other) = default;
  
 diff --git content/public/browser/web_contents.h content/public/browser/web_contents.h
-index 50236e972100..8c09c1b53d27 100644
+index 367705d05ebc..7e25a0de3020 100644
 --- content/public/browser/web_contents.h
 +++ content/public/browser/web_contents.h
 @@ -76,9 +76,11 @@ class BrowserPluginGuestDelegate;
diff --git a/patch/patches/webkit_plugin_info_2015.patch b/patch/patches/webkit_plugin_info_2015.patch
index 0fbaa131a..477ba7c17 100644
--- a/patch/patches/webkit_plugin_info_2015.patch
+++ b/patch/patches/webkit_plugin_info_2015.patch
@@ -44,10 +44,10 @@ index 80a9ec9bc75b..13cbb056cdfa 100644
                                                          .Top()
                                                          .GetSecurityContext()
 diff --git third_party/blink/renderer/core/frame/local_frame.cc third_party/blink/renderer/core/frame/local_frame.cc
-index 60b3fe655dc8..8dedb75b8d8b 100644
+index 1f5407c50edd..648753d70ec7 100644
 --- third_party/blink/renderer/core/frame/local_frame.cc
 +++ third_party/blink/renderer/core/frame/local_frame.cc
-@@ -1182,7 +1182,7 @@ WebContentSettingsClient* LocalFrame::GetContentSettingsClient() {
+@@ -1188,7 +1188,7 @@ WebContentSettingsClient* LocalFrame::GetContentSettingsClient() {
  PluginData* LocalFrame::GetPluginData() const {
    if (!Loader().AllowPlugins(kNotAboutToInstantiatePlugin))
      return nullptr;
diff --git a/patch/patches/webkit_popups.patch b/patch/patches/webkit_popups.patch
index 3841dbdaa..f4ba5234f 100644
--- a/patch/patches/webkit_popups.patch
+++ b/patch/patches/webkit_popups.patch
@@ -62,7 +62,7 @@ index 720ea6fcfb7f..9116fbdcf673 100644
    TransformationMatrix device_emulation_transform_;
  
 diff --git third_party/blink/renderer/core/page/chrome_client_impl.cc third_party/blink/renderer/core/page/chrome_client_impl.cc
-index 2df0aefc5764..6ef2dae97acd 100644
+index 97c37b0ae3ae..40f236651ced 100644
 --- third_party/blink/renderer/core/page/chrome_client_impl.cc
 +++ third_party/blink/renderer/core/page/chrome_client_impl.cc
 @@ -848,7 +848,7 @@ bool ChromeClientImpl::HasOpenedPopup() const {
diff --git a/patch/patches/webview_plugin_2020.patch b/patch/patches/webview_plugin_2020.patch
index 3a5c5ab10..e7d9ad46d 100644
--- a/patch/patches/webview_plugin_2020.patch
+++ b/patch/patches/webview_plugin_2020.patch
@@ -1,5 +1,5 @@
 diff --git chrome/app/generated_resources.grd chrome/app/generated_resources.grd
-index 0f25c61d5170..201f4d1c1651 100644
+index 875bf04a1a60..09990ac7115b 100644
 --- chrome/app/generated_resources.grd
 +++ chrome/app/generated_resources.grd
 @@ -4648,7 +4648,7 @@ Keep your key file in a safe place. You will need it to create new versions of y