cef/patch/patches/viz_osr_2575.patch

diff --git components/viz/host/host_display_client.cc components/viz/host/host_display_client.cc
index 7af928a9a030c..a702033cb2d47 100644
--- components/viz/host/host_display_client.cc
+++ components/viz/host/host_display_client.cc
@@ -47,9 +47,14 @@ void HostDisplayClient::OnDisplayReceivedCALayerParams(
 }
 #endif
 
-#if BUILDFLAG(IS_WIN)
+void HostDisplayClient::UseProxyOutputDevice(
+    UseProxyOutputDeviceCallback callback) {
+  std::move(callback).Run(false);
+}
+
 void HostDisplayClient::CreateLayeredWindowUpdater(
     mojo::PendingReceiver<mojom::LayeredWindowUpdater> receiver) {
+#if BUILDFLAG(IS_WIN)
   if (!NeedsToUseLayerWindow(widget_)) {
     DLOG(ERROR) << "HWND shouldn't be using a layered window";
     return;
@@ -57,7 +62,10 @@ void HostDisplayClient::CreateLayeredWindowUpdater(
 
   layered_window_updater_ =
       std::make_unique<LayeredWindowUpdaterImpl>(widget_, std::move(receiver));
+#endif
 }
+
+#if BUILDFLAG(IS_WIN)
 void HostDisplayClient::AddChildWindowToBrowser(
     gpu::SurfaceHandle child_window) {
   NOTREACHED();
diff --git components/viz/host/host_display_client.h components/viz/host/host_display_client.h
index cb16487f9fc08..6191f8801f302 100644
--- components/viz/host/host_display_client.h
+++ components/viz/host/host_display_client.h
@@ -39,16 +39,17 @@ class VIZ_HOST_EXPORT HostDisplayClient : public mojom::DisplayClient {
   gfx::AcceleratedWidget widget() const { return widget_; }
 #endif
 
- private:
   // mojom::DisplayClient implementation:
+  void UseProxyOutputDevice(UseProxyOutputDeviceCallback callback) override;
+
 #if BUILDFLAG(IS_APPLE)
   void OnDisplayReceivedCALayerParams(
       const gfx::CALayerParams& ca_layer_params) override;
 #endif
 
-#if BUILDFLAG(IS_WIN)
   void CreateLayeredWindowUpdater(
       mojo::PendingReceiver<mojom::LayeredWindowUpdater> receiver) override;
+#if BUILDFLAG(IS_WIN)
   void AddChildWindowToBrowser(gpu::SurfaceHandle child_window) override;
 #endif
 
diff --git components/viz/host/layered_window_updater_impl.cc components/viz/host/layered_window_updater_impl.cc
index 8f726bde2cb5d..0737835d1e9d1 100644
--- components/viz/host/layered_window_updater_impl.cc
+++ components/viz/host/layered_window_updater_impl.cc
@@ -46,7 +46,7 @@ void LayeredWindowUpdaterImpl::OnAllocatedSharedMemory(
   // |region|'s handle will close when it goes out of scope.
 }
 
-void LayeredWindowUpdaterImpl::Draw(DrawCallback draw_callback) {
+void LayeredWindowUpdaterImpl::Draw(const gfx::Rect& damage_rect, DrawCallback draw_callback) {
   TRACE_EVENT0("viz", "LayeredWindowUpdaterImpl::Draw");
 
   if (!canvas_) {
diff --git components/viz/host/layered_window_updater_impl.h components/viz/host/layered_window_updater_impl.h
index 8af69cac78b74..9f74e511c263d 100644
--- components/viz/host/layered_window_updater_impl.h
+++ components/viz/host/layered_window_updater_impl.h
@@ -38,7 +38,7 @@ class VIZ_HOST_EXPORT LayeredWindowUpdaterImpl
   // mojom::LayeredWindowUpdater implementation.
   void OnAllocatedSharedMemory(const gfx::Size& pixel_size,
                                base::UnsafeSharedMemoryRegion region) override;
-  void Draw(DrawCallback draw_callback) override;
+  void Draw(const gfx::Rect& damage_rect, DrawCallback draw_callback) override;
 
  private:
   const HWND hwnd_;
diff --git components/viz/service/BUILD.gn components/viz/service/BUILD.gn
index 5756139efd53e..a80a1504fbbce 100644
--- components/viz/service/BUILD.gn
+++ components/viz/service/BUILD.gn
@@ -247,6 +247,8 @@ viz_component("service") {
     "transitions/surface_animation_manager.h",
     "transitions/transferable_resource_tracker.cc",
     "transitions/transferable_resource_tracker.h",
+    "//cef/libcef/browser/osr/software_output_device_proxy.cc",
+    "//cef/libcef/browser/osr/software_output_device_proxy.h",
   ]
 
   defines = [ "VIZ_SERVICE_IMPLEMENTATION" ]
diff --git components/viz/service/display_embedder/output_surface_provider_impl.cc components/viz/service/display_embedder/output_surface_provider_impl.cc
index e8e3237bb2b8f..cec146af141ba 100644
--- components/viz/service/display_embedder/output_surface_provider_impl.cc
+++ components/viz/service/display_embedder/output_surface_provider_impl.cc
@@ -18,6 +18,7 @@
 #include "build/chromecast_buildflags.h"
 #include "build/chromeos_buildflags.h"
 #include "cc/base/switches.h"
+#include "cef/libcef/browser/osr/software_output_device_proxy.h"
 #include "components/viz/common/display/renderer_settings.h"
 #include "components/viz/common/features.h"
 #include "components/viz/common/frame_sinks/begin_frame_source.h"
@@ -31,6 +32,7 @@
 #include "gpu/command_buffer/service/scheduler_sequence.h"
 #include "gpu/config/gpu_finch_features.h"
 #include "gpu/ipc/common/surface_handle.h"
+#include "mojo/public/cpp/bindings/sync_call_restrictions.h"
 #include "ui/base/ui_base_switches.h"
 
 #if BUILDFLAG(IS_WIN)
@@ -146,6 +148,20 @@ OutputSurfaceProviderImpl::CreateSoftwareOutputDeviceForPlatform(
   if (headless_)
     return std::make_unique<SoftwareOutputDevice>();
 
+  {
+    mojo::ScopedAllowSyncCallForTesting allow_sync;
+    DCHECK(display_client);
+    bool use_proxy_output_device = false;
+    if (display_client->UseProxyOutputDevice(&use_proxy_output_device) &&
+        use_proxy_output_device) {
+      mojo::PendingRemote<mojom::LayeredWindowUpdater> layered_window_updater;
+      display_client->CreateLayeredWindowUpdater(
+          layered_window_updater.InitWithNewPipeAndPassReceiver());
+      return std::make_unique<SoftwareOutputDeviceProxy>(
+          std::move(layered_window_updater));
+    }
+  }
+
 #if BUILDFLAG(IS_WIN)
   return CreateSoftwareOutputDeviceWin(surface_handle, &output_device_backing_,
                                        display_client);
diff --git components/viz/service/display_embedder/software_output_device_win.cc components/viz/service/display_embedder/software_output_device_win.cc
index 796ae2688436e..37a3406790210 100644
--- components/viz/service/display_embedder/software_output_device_win.cc
+++ components/viz/service/display_embedder/software_output_device_win.cc
@@ -193,8 +193,9 @@ void SoftwareOutputDeviceWinProxy::EndPaintDelegated(
   if (!canvas_)
     return;
 
-  layered_window_updater_->Draw(base::BindOnce(
-      &SoftwareOutputDeviceWinProxy::DrawAck, base::Unretained(this)));
+  layered_window_updater_->Draw(
+      damage_rect, base::BindOnce(&SoftwareOutputDeviceWinProxy::DrawAck,
+                                  base::Unretained(this)));
   waiting_on_draw_ack_ = true;
 
   TRACE_EVENT_ASYNC_BEGIN0("viz", "SoftwareOutputDeviceWinProxy::Draw", this);
diff --git content/browser/compositor/viz_process_transport_factory.cc content/browser/compositor/viz_process_transport_factory.cc
index 36a762f6a8054..0e5983a4f011d 100644
--- content/browser/compositor/viz_process_transport_factory.cc
+++ content/browser/compositor/viz_process_transport_factory.cc
@@ -408,8 +408,13 @@ void VizProcessTransportFactory::OnEstablishedGpuChannel(
   mojo::AssociatedRemote<viz::mojom::DisplayPrivate> display_private;
   root_params->display_private =
       display_private.BindNewEndpointAndPassReceiver();
-  compositor_data.display_client =
-      std::make_unique<HostDisplayClient>(compositor);
+  if (compositor->delegate()) {
+    compositor_data.display_client =
+        compositor->delegate()->CreateHostDisplayClient();
+  } else {
+    compositor_data.display_client =
+        std::make_unique<HostDisplayClient>(compositor);
+  }
   root_params->display_client =
       compositor_data.display_client->GetBoundRemote(resize_task_runner_);
   mojo::AssociatedRemote<viz::mojom::ExternalBeginFrameController>
diff --git mojo/public/cpp/bindings/sync_call_restrictions.h mojo/public/cpp/bindings/sync_call_restrictions.h
index 0173f9b181714..36a734d64738e 100644
--- mojo/public/cpp/bindings/sync_call_restrictions.h
+++ mojo/public/cpp/bindings/sync_call_restrictions.h
@@ -43,6 +43,7 @@ class Compositor;
 }  // namespace ui
 
 namespace viz {
+class GpuDisplayProvider;
 class GpuHostImpl;
 class HostFrameSinkManager;
 class HostGpuMemoryBufferManager;
@@ -119,6 +120,8 @@ class COMPONENT_EXPORT(MOJO_CPP_BINDINGS) SyncCallRestrictions {
   // For preventing frame swaps of wrong size during resize on Windows.
   // (https://crbug.com/811945)
   friend class ui::Compositor;
+  // For query of whether to use SoftwareOutputDevice or not.
+  friend class viz::GpuDisplayProvider;
   // For calling sync mojo API to get cdm origin. The service and the client are
   // running in the same process, so it won't block anything.
   // TODO(159346933) Remove once the origin isolation logic is moved outside of
diff --git services/viz/privileged/mojom/compositing/display_private.mojom services/viz/privileged/mojom/compositing/display_private.mojom
index d7deccb6e6ec6..6a91f4aae6259 100644
--- services/viz/privileged/mojom/compositing/display_private.mojom
+++ services/viz/privileged/mojom/compositing/display_private.mojom
@@ -108,13 +108,15 @@ interface DisplayPrivate {
 
 // DisplayClient allows privileged clients to receive events from the Display.
 interface DisplayClient {
+  [Sync]
+  UseProxyOutputDevice() => (bool success);
+
   // Called when new Core Animation Layer params are received.
   [EnableIf=is_apple]
   OnDisplayReceivedCALayerParams(gfx.mojom.CALayerParams ca_layer_params);
 
   // Creates a LayeredWindowUpdater implementation to draw into a layered
   // window.
-  [EnableIf=is_win]
   CreateLayeredWindowUpdater(pending_receiver<LayeredWindowUpdater> receiver);
 
   // Sends the created child window to the browser process so that it can be
diff --git services/viz/privileged/mojom/compositing/layered_window_updater.mojom services/viz/privileged/mojom/compositing/layered_window_updater.mojom
index 2f462f0deb5fc..695869b83cefa 100644
--- services/viz/privileged/mojom/compositing/layered_window_updater.mojom
+++ services/viz/privileged/mojom/compositing/layered_window_updater.mojom
@@ -26,5 +26,5 @@ interface LayeredWindowUpdater {
   // Draws to the HWND by copying pixels from shared memory. Callback must be
   // called after draw operation is complete to signal shared memory can be
   // modified.
-  Draw() => ();
+  Draw(gfx.mojom.Rect damage_rect) => ();
 };
diff --git ui/compositor/compositor.h ui/compositor/compositor.h
index 2b5ec776d7d90..ad2c8d8796a7e 100644
--- ui/compositor/compositor.h
+++ ui/compositor/compositor.h
@@ -33,7 +33,9 @@
 #include "components/viz/common/frame_sinks/begin_frame_args.h"
 #include "components/viz/common/surfaces/frame_sink_id.h"
 #include "components/viz/common/surfaces/subtree_capture_id.h"
+#include "components/viz/host/host_display_client.h"
 #include "components/viz/host/host_frame_sink_client.h"
+#include "components/viz/service/display/software_output_device.h"
 #include "mojo/public/cpp/bindings/associated_remote.h"
 #include "mojo/public/cpp/bindings/pending_remote.h"
 #include "services/viz/privileged/mojom/compositing/display_private.mojom.h"
@@ -146,6 +148,14 @@ class COMPOSITOR_EXPORT ContextFactory {
   virtual viz::HostFrameSinkManager* GetHostFrameSinkManager() = 0;
 };
 
+class COMPOSITOR_EXPORT CompositorDelegate {
+ public:
+  virtual std::unique_ptr<viz::HostDisplayClient> CreateHostDisplayClient() = 0;
+
+ protected:
+  virtual ~CompositorDelegate() {}
+};
+
 // Compositor object to take care of GPU painting.
 // A Browser compositor object is responsible for generating the final
 // displayable form of pixels comprising a single widget's contents. It draws an
@@ -189,6 +199,9 @@ class COMPOSITOR_EXPORT Compositor : public base::PowerSuspendObserver,
   // Schedules a redraw of the layer tree associated with this compositor.
   void ScheduleDraw();
 
+  CompositorDelegate* delegate() const { return delegate_; }
+  void SetDelegate(CompositorDelegate* delegate) { delegate_ = delegate; }
+
   // Sets the root of the layer tree drawn by this Compositor. The root layer
   // must have no parent. The compositor's root layer is reset if the root layer
   // is destroyed. NULL can be passed to reset the root layer, in which case the
@@ -539,6 +552,8 @@ class COMPOSITOR_EXPORT Compositor : public base::PowerSuspendObserver,
 
   std::unique_ptr<PendingBeginFrameArgs> pending_begin_frame_args_;
 
+  CompositorDelegate* delegate_ = nullptr;
+
   // The root of the Layer tree drawn by this compositor.
   raw_ptr<Layer> root_layer_ = nullptr;