Update to Chromium version 86.0.4240.0 (#800218)

- CefURLRequest::Create is no longer supported in the renderer process
  (see https://crbug.com/891872). Use CefFrame::CreateURLRequest instead.
- Mac platform definitions have been changed from `MACOSX` to `MAC`
  (see https://crbug.com/1105907) and related CMake macro names have
  been updated. The old `OS_MACOSX` define is still set in code and CMake
  for backwards compatibility.
- Linux ARM build is currently broken (see https://crbug.com/1123214).

patch/patches/chrome_browser.patch

@@ -1,5 +1,5 @@
 diff --git chrome/browser/BUILD.gn chrome/browser/BUILD.gn
-index 9fe789540c05..a2646c13e5d5 100644
+index 6cb9ee1f0764..8109a134907e 100644
 --- chrome/browser/BUILD.gn
 +++ chrome/browser/BUILD.gn
 @@ -12,6 +12,7 @@ import("//build/config/crypto.gni")
@@ -10,15 +10,15 @@ index 9fe789540c05..a2646c13e5d5 100644
  import("//chrome/browser/buildflags.gni")
  import("//chrome/browser/downgrade/buildflags.gni")
  import("//chrome/common/features.gni")
-@@ -1824,6 +1825,7 @@ static_library("browser") {
-     "//base/util/values:values_util",
+@@ -1870,6 +1871,7 @@ static_library("browser") {
      "//build:branding_buildflags",
+     "//build:lacros_buildflags",
      "//cc",
 +    "//cef/libcef/features",
      "//chrome:extra_resources",
      "//chrome:resources",
      "//chrome:strings",
-@@ -2156,6 +2158,10 @@ static_library("browser") {
+@@ -2221,6 +2223,10 @@ static_library("browser") {
      ]
    }
  
@@ -29,3 +29,75 @@ index 9fe789540c05..a2646c13e5d5 100644
    if (is_android) {
      sources += [
        "after_startup_task_utils_android.cc",
+@@ -3422,8 +3428,6 @@ static_library("browser") {
+       "nearby_sharing/outgoing_share_target_info.h",
+       "nearby_sharing/paired_key_verification_runner.cc",
+       "nearby_sharing/paired_key_verification_runner.h",
+-      "nearby_sharing/share_target.cc",
+-      "nearby_sharing/share_target.h",
+       "nearby_sharing/share_target_discovered_callback.h",
+       "nearby_sharing/share_target_info.cc",
+       "nearby_sharing/share_target_info.h",
+@@ -3617,13 +3621,6 @@ static_library("browser") {
+       "serial/serial_chooser_context_factory.cc",
+       "serial/serial_chooser_context_factory.h",
+       "serial/serial_chooser_histograms.h",
+-      "sharesheet/sharesheet_controller.h",
+-      "sharesheet/sharesheet_service.cc",
+-      "sharesheet/sharesheet_service.h",
+-      "sharesheet/sharesheet_service_delegate.cc",
+-      "sharesheet/sharesheet_service_delegate.h",
+-      "sharesheet/sharesheet_service_factory.cc",
+-      "sharesheet/sharesheet_service_factory.h",
+       "sharing/click_to_call/click_to_call_context_menu_observer.cc",
+       "sharing/click_to_call/click_to_call_context_menu_observer.h",
+       "sharing/click_to_call/click_to_call_metrics.cc",
+diff --git chrome/browser/ui/views/toolbar/toolbar_view.cc chrome/browser/ui/views/toolbar/toolbar_view.cc
+index 7ccd06a9b0fe..183da2c7238d 100644
+--- chrome/browser/ui/views/toolbar/toolbar_view.cc
++++ chrome/browser/ui/views/toolbar/toolbar_view.cc
+@@ -232,8 +232,8 @@ void ToolbarView::Init() {
+     media_button = std::make_unique<MediaToolbarButtonView>(browser_);
+   }
+ 
+-  std::unique_ptr<SharesheetButton> sharesheet_button;
+ #if defined(OS_CHROMEOS)
++  std::unique_ptr<SharesheetButton> sharesheet_button;
+   if (base::FeatureList::IsEnabled(features::kSharesheet)) {
+     sharesheet_button = std::make_unique<SharesheetButton>(browser_);
+   }
+@@ -276,8 +276,10 @@ void ToolbarView::Init() {
+   if (media_button)
+     media_button_ = AddChildView(std::move(media_button));
+ 
++#if defined(OS_CHROMEOS)
+   if (sharesheet_button)
+     sharesheet_button_ = AddChildView(std::move(sharesheet_button));
++#endif
+ 
+   if (toolbar_account_icon_container) {
+     toolbar_account_icon_container_ =
+@@ -966,3 +968,4 @@ void ToolbarView::OnTouchUiChanged() {
+     PreferredSizeChanged();
+   }
+ }
++
+diff --git chrome/browser/ui/views/toolbar/toolbar_view.h chrome/browser/ui/views/toolbar/toolbar_view.h
+index f4af66fa98b3..3c4d171c091e 100644
+--- chrome/browser/ui/views/toolbar/toolbar_view.h
++++ chrome/browser/ui/views/toolbar/toolbar_view.h
+@@ -273,7 +273,9 @@ class ToolbarView : public views::AccessiblePaneView,
+   media_router::CastToolbarButton* cast_ = nullptr;
+   ToolbarAccountIconContainerView* toolbar_account_icon_container_ = nullptr;
+   AvatarToolbarButton* avatar_ = nullptr;
++#if defined(OS_CHROMEOS)
+   SharesheetButton* sharesheet_button_ = nullptr;
++#endif
+   MediaToolbarButtonView* media_button_ = nullptr;
+   BrowserAppMenuButton* app_menu_button_ = nullptr;
+ 
+@@ -302,3 +304,4 @@ class ToolbarView : public views::AccessiblePaneView,
+ };
+ 
+ #endif  // CHROME_BROWSER_UI_VIEWS_TOOLBAR_TOOLBAR_VIEW_H_
++