Tiling priorities in Android Webview.

android_webview/browser/shared_renderer_state.h

Index: android_webview/browser/shared_renderer_state.h
diff --git a/android_webview/browser/shared_renderer_state.h b/android_webview/browser/shared_renderer_state.h
index 89554ac8e12aea4648a4aac5b2a84a8a74030056..54ce66e77510c3ed733b4df3d0004e4069f11b7f 100644
--- a/android_webview/browser/shared_renderer_state.h
+++ b/android_webview/browser/shared_renderer_state.h
@@ -12,6 +12,7 @@
 #include "cc/output/compositor_frame_ack.h"
 #include "ui/gfx/geometry/rect.h"
 #include "ui/gfx/geometry/vector2d.h"
+#include "ui/gfx/transform.h"
 
 namespace cc {
 class CompositorFrameAck;
@@ -21,6 +22,10 @@ namespace gpu {
 class GLInProcessContext;
 }
 
+namespace content {
+class SynchronousCompositor;
+}
+
 namespace android_webview {
 
 class BrowserViewRendererClient;
@@ -44,13 +49,23 @@ class SharedRendererState {
   ~SharedRendererState();
 
   void ClientRequestDrawGL();
+  void ClientPostInvalidate();
 
   void SetDrawGLInput(scoped_ptr<DrawGLInput> input);
   scoped_ptr<DrawGLInput> PassDrawGLInput();
 
+  void PostExternalDrawConstraintsToChildCompositor(
+      const gfx::Rect& clip_,
+      const gfx::Transform& transform);
+
   // Set by UI and read by RT.
   void SetHardwareAllowed(bool allowed);
   bool IsHardwareAllowed() const;
+  void SetParentDrawConstraintsDirty(bool dirty);
+  bool IsParentDrawConstraintsDirty();
+
+  const gfx::Rect& ParentClip() const;
+  const gfx::Transform& ParentTransform() const;
 
   void SetSharedContext(gpu::GLInProcessContext* context);
   gpu::GLInProcessContext* GetSharedContext() const;
@@ -61,6 +76,7 @@ class SharedRendererState {
 
  private:
   void ClientRequestDrawGLOnUIThread();
+  void ClientPostInvalidateOnUIThread();
 
   scoped_refptr<base::MessageLoopProxy> ui_loop_;
   BrowserViewRendererClient* client_on_ui_;
@@ -71,6 +87,9 @@ class SharedRendererState {
   mutable base::Lock lock_;
   scoped_ptr<DrawGLInput> draw_gl_input_;
   bool hardware_allowed_;
+  bool parent_draw_constraints_dirty_;
+  gfx::Rect parent_clip_;
+  gfx::Transform parent_transform_;
   gpu::GLInProcessContext* share_context_;
   cc::ReturnedResourceArray returned_resources_;
 };