Fix UpdateTilePriorities viewport in Android WebView.

content/browser/android/in_process/synchronous_compositor_output_surface.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_BROWSER_ANDROID_IN_PROCESS_SYNCHRONOUS_COMPOSITOR_OUTPUT_SURFACE_H_
 #define CONTENT_BROWSER_ANDROID_IN_PROCESS_SYNCHRONOUS_COMPOSITOR_OUTPUT_SURFACE_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "cc/output/output_surface.h"
 #include "content/public/browser/android/synchronous_compositor.h"
+#include "ui/gfx/transform.h"
 
 namespace cc {
 class ContextProvider;
 class CompositorFrameMetadata;
 }
 
 namespace content {
 
 class SynchronousCompositorClient;
 class SynchronousCompositorOutputSurface;
@@ skipping 36 matching lines @@
   virtual void SetNeedsBeginFrame(bool enable) OVERRIDE;
   virtual void SwapBuffers(cc::CompositorFrame* frame) OVERRIDE;
 
   // Partial SynchronousCompositor API implementation.
   bool InitializeHwDraw(
       scoped_refptr<gfx::GLSurface> surface,
       scoped_refptr<cc::ContextProvider> offscreen_context_provider);
   void ReleaseHwDraw();
   bool DemandDrawHw(gfx::Size surface_size,
                     const gfx::Transform& transform,
+                    gfx::Rect viewport,
                     gfx::Rect clip,
                     bool stencil_enabled);
   bool DemandDrawSw(SkCanvas* canvas);
 
  private:
   class SoftwareDevice;
   friend class SoftwareDevice;
 
   // Private OutputSurface overrides.
   virtual void PostCheckForRetroactiveBeginFrame() OVERRIDE;
 
-  void InvokeComposite(gfx::Size damage_size);
+  void InvokeComposite(const gfx::Transform& transform,
+                       gfx::Rect viewport,
+                       gfx::Rect clip,
+                       bool valid_for_tile_management);
   bool CalledOnValidThread() const;
   SynchronousCompositorOutputSurfaceDelegate* GetDelegate();
 
   int routing_id_;
   bool needs_begin_frame_;
   bool invoking_composite_;
   bool did_swap_buffer_;
 
+  gfx::Transform cached_hw_transform_;
+  gfx::Rect cached_hw_viewport_;
+  gfx::Rect cached_hw_clip_;
+
   // Only valid (non-NULL) during a DemandDrawSw() call.
   SkCanvas* current_sw_canvas_;
 
   DISALLOW_COPY_AND_ASSIGN(SynchronousCompositorOutputSurface);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_ANDROID_IN_PROCESS_SYNCHRONOUS_COMPOSITOR_OUTPUT_SURFACE_H_