Use IDCompositionSurface to implement DirectCompositionSurfaceWin.

content/browser/compositor/gpu_browser_compositor_output_surface.cc

Index: content/browser/compositor/gpu_browser_compositor_output_surface.cc
diff --git a/content/browser/compositor/gpu_browser_compositor_output_surface.cc b/content/browser/compositor/gpu_browser_compositor_output_surface.cc
index f0184f56bb33c50e00576ebe0258ee100abc4c16..143a9b7fd8ecac6e5e097b46f89112dad564d787 100644
--- a/content/browser/compositor/gpu_browser_compositor_output_surface.cc
+++ b/content/browser/compositor/gpu_browser_compositor_output_surface.cc
@@ -90,6 +90,8 @@ void GpuBrowserCompositorOutputSurface::Reshape(
     const gfx::ColorSpace& color_space,
     bool has_alpha,
     bool use_stencil) {
+  size_ = size;
+  has_set_draw_rectangle_ = false;
   context_provider()->ContextGL()->ResizeCHROMIUM(
       size.width(), size.height(), device_scale_factor, has_alpha);
 }
@@ -110,6 +112,8 @@ void GpuBrowserCompositorOutputSurface::SwapBuffers(
     }
   }
 
+  set_draw_rectangle_for_frame_ = false;
+
   if (swap_rect == gfx::Rect(frame.size))
     context_provider_->ContextSupport()->Swap();
   else
@@ -138,6 +142,18 @@ void GpuBrowserCompositorOutputSurface::SetSurfaceSuspendedForRecycle(
     bool suspended) {}
 #endif
 
+void GpuBrowserCompositorOutputSurface::SetDrawRectangle(
+    const gfx::Rect& rect) {
+  if (set_draw_rectangle_for_frame_)
+    return;
+  DCHECK(gfx::Rect(size_).Contains(rect));
+  DCHECK(has_set_draw_rectangle_ || (gfx::Rect(size_) == rect));
+  set_draw_rectangle_for_frame_ = true;
+  has_set_draw_rectangle_ = true;
+  context_provider()->ContextGL()->SetDrawRectangleCHROMIUM(
+      rect.x(), rect.y(), rect.width(), rect.height());
+}
+
 gpu::CommandBufferProxyImpl*
 GpuBrowserCompositorOutputSurface::GetCommandBufferProxy() {
   ui::ContextProviderCommandBuffer* provider_command_buffer =