Tiling priorities in Android Webview.

content/public/browser/android/synchronous_compositor.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_PUBLIC_BROWSER_ANDROID_SYNCHRONOUS_COMPOSITOR_H_
 #define CONTENT_PUBLIC_BROWSER_ANDROID_SYNCHRONOUS_COMPOSITOR_H_
 
 #include "base/memory/ref_counted.h"
 #include "content/common/content_export.h"
 #include "gpu/command_buffer/service/in_process_command_buffer.h"
@@ skipping 72 matching lines @@
   // by the compositor and is only valid between InitializeHwDraw and
   // ReleaseHwDraw.
   virtual gpu::GLInProcessContext* GetShareContext() = 0;
 
   // "On demand" hardware draw. The content is first clipped to |damage_area|,
   // then transformed through |transform|, and finally clipped to |view_size|.
   virtual scoped_ptr<cc::CompositorFrame> DemandDrawHw(
       gfx::Size surface_size,
       const gfx::Transform& transform,
       gfx::Rect viewport,
-      gfx::Rect clip) = 0;
+      gfx::Rect clip,
+      gfx::Rect external_tiling_rect,
+      gfx::Transform external_tiling_transform) = 0;
 
   // For delegated rendering, return resources from parent compositor to this.
   // Note that all resources must be returned before ReleaseHwDraw.
   virtual void ReturnResources(const cc::CompositorFrameAck& frame_ack) = 0;
 
   // "On demand" SW draw, into the supplied canvas (observing the transform
   // and clip set there-in).
   virtual bool DemandDrawSw(SkCanvas* canvas) = 0;
 
   // Set the memory limit policy of this compositor.
   virtual void SetMemoryPolicy(
       const SynchronousCompositorMemoryPolicy& policy) = 0;
 
   // Should be called by the embedder after the embedder had modified the
   // scroll offset of the root layer (as returned by
   // SynchronousCompositorClient::GetTotalRootLayerScrollOffset).
   virtual void DidChangeRootLayerScrollOffset() = 0;
 
  protected:
   virtual ~SynchronousCompositor() {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_ANDROID_SYNCHRONOUS_COMPOSITOR_H_