Plumb damage rect to browser compositor.

ui/gfx/compositor/layer.cc

 // Copyright (c) 2011 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.
 
 #include "ui/gfx/compositor/layer.h"
 
 #include <algorithm>
 
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
@@ skipping 311 matching lines @@
 }
 
 void Layer::SchedulePaint(const gfx::Rect& invalid_rect) {
 #if defined(USE_WEBKIT_COMPOSITOR)
   WebKit::WebFloatRect web_rect(invalid_rect.x(),
       invalid_rect.y(),
       invalid_rect.width(),
       invalid_rect.height());
   if (!web_layer_is_accelerated_)
     web_layer_.to<WebKit::WebContentLayer>().invalidateRect(web_rect);
+  else
+    web_layer_.to<WebKit::WebExternalTextureLayer>().setUpdateRect(web_rect);
 #else
   invalid_rect_ = invalid_rect_.Union(invalid_rect);
   ScheduleDraw();
 #endif
 }
 
 void Layer::ScheduleDraw() {
   Compositor* compositor = GetCompositor();
   if (compositor)
     compositor->ScheduleDraw();
@@ skipping 418 matching lines @@
   unsigned int color = 0xFF000000;
   color |= web_layer_is_accelerated_ ? 0x0000FF00 : 0x00FF0000;
   bool opaque = fills_bounds_opaquely_ && (GetCombinedOpacity() == 1.f);
   if (!opaque)
     color |= 0xFF;
   web_layer_.setDebugBorderColor(color);
 }
 #endif
 
 }  // namespace ui