Android WebView Merged-Thread Hardware Draw

content/public/renderer/android/synchronous_compositor.h

Index: content/public/renderer/android/synchronous_compositor.h
diff --git a/content/public/renderer/android/synchronous_compositor.h b/content/public/renderer/android/synchronous_compositor.h
index f0c380d07af84e97862475125f3e04ff666f21ed..42aec2488ac4b1860849b7ec1c4e5e52e177987d 100644
--- a/content/public/renderer/android/synchronous_compositor.h
+++ b/content/public/renderer/android/synchronous_compositor.h
@@ -5,8 +5,15 @@
 #ifndef CONTENT_PUBLIC_RENDERER_ANDROID_SYNCHRONOUS_COMPOSTIOR_
 #define CONTENT_PUBLIC_RENDERER_ANDROID_SYNCHRONOUS_COMPOSITOR_
 
+#include "ui/gfx/rect.h"
+#include "ui/gfx/size.h"
+
 class SkCanvas;
 
+namespace gfx {
+class Transform;
+};
+
 namespace content {
 
 class SynchronousCompositorClient;
@@ -26,6 +33,13 @@ class SynchronousCompositor {
   // and clip set there-in).
   virtual bool DemandDrawSw(SkCanvas* canvas) = 0;
 
+  // "On demand" hardware draw. The content is first clipped to |damage_area|,
+  // then transformed through |transform|, and finally clipped to |view_size|.
+  virtual bool DemandDrawHw(
+      gfx::Size view_size,
+      const gfx::Transform& transform,
+      gfx::Rect damage_area) = 0;
+
  protected:
   virtual ~SynchronousCompositor() {}
 };