Use optimized scrolling for pepper plugins.

chrome/renderer/render_widget_fullscreen_pepper.cc

 // Copyright (c) 2010 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 "chrome/renderer/render_widget_fullscreen_pepper.h"
 
 #include "chrome/common/render_messages.h"
 #include "chrome/renderer/render_thread.h"
 #include "third_party/WebKit/WebKit/chromium/public/WebCursorInfo.h"
 #include "third_party/WebKit/WebKit/chromium/public/WebSize.h"
@@ skipping 127 matching lines @@
   virtual ~WidgetFullscreenContainer() { }
 
   virtual void Invalidate() {
     widget_->GenerateFullRepaint();
   }
 
   virtual void InvalidateRect(const WebKit::WebRect& rect) {
     widget_->didInvalidateRect(rect);
   }
 
+  virtual void ScrollRect(int dx, int dy, const WebKit::WebRect& rect) {
+    widget_->didScrollRect(dx, dy, rect);
+  }
+
   virtual void Destroy() {
     widget_->SendClose();
   }
 
  private:
   RenderWidgetFullscreenPepper* widget_;
 
   DISALLOW_COPY_AND_ASSIGN(WidgetFullscreenContainer);
 };
 
@@ skipping 45 matching lines @@
 void RenderWidgetFullscreenPepper::SendClose() {
   // This function is called by the plugin instance as it's going away, so reset
   // plugin_ to NULL to avoid calling into a dangling pointer e.g. on Close().
   plugin_ = NULL;
   Send(new ViewHostMsg_Close(routing_id_));
 }
 
 void RenderWidgetFullscreenPepper::GenerateFullRepaint() {
   didInvalidateRect(gfx::Rect(size_.width(), size_.height()));
 }