Fix UpdateTilePriorities viewport 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 "ui/gfx/rect.h"
@@ skipping 37 matching lines @@
 
   // Reverse of InitializeHwDraw above. Can only be called while hardware draw
   // is already initialized. Brings compositor back to software only mode and
   // releases all hardware resources.
   virtual void ReleaseHwDraw() = 0;
 
   // "On demand" hardware draw. The content is first clipped to |damage_area|,
   // then transformed through |transform|, and finally clipped to |view_size|
   // and by the existing stencil buffer if any.
   virtual bool DemandDrawHw(
-      gfx::Size view_size,
+      gfx::Size surface_size,
       const gfx::Transform& transform,
-      gfx::Rect damage_area,
+      gfx::Rect viewport,
+      gfx::Rect clip,
       bool stencil_enabled) = 0;
 
   // "On demand" SW draw, into the supplied canvas (observing the transform
   // and clip set there-in).
   virtual bool DemandDrawSw(SkCanvas* canvas) = 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_