Expose locks for CopyFromCompositingSurface/CopyFromBackingStore API

content/browser/renderer_host/render_widget_host_impl.h

 // Copyright (c) 2012 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_RENDERER_HOST_RENDER_WIDGET_HOST_IMPL_H_
 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_IMPL_H_
 
 #include <deque>
 #include <list>
 #include <map>
@@ skipping 121 matching lines @@
   virtual void Unselect() OVERRIDE;
   virtual void UpdateTextDirection(blink::WebTextDirection direction) OVERRIDE;
   virtual void NotifyTextDirection() OVERRIDE;
   virtual void Focus() OVERRIDE;
   virtual void Blur() OVERRIDE;
   virtual void SetActive(bool active) OVERRIDE;
   virtual void CopyFromBackingStore(
       const gfx::Rect& src_rect,
       const gfx::Size& accelerated_dst_size,
       const base::Callback<void(bool, const SkBitmap&)>& callback) OVERRIDE;
+  virtual bool CanCopyFromBackingStore() OVERRIDE;
+  virtual void LockForCopyFromBackingStore() OVERRIDE;
+  virtual void UnlockForCopyFromBackingStore() OVERRIDE;
 #if defined(TOOLKIT_GTK)
   virtual bool CopyFromBackingStoreToGtkWindow(const gfx::Rect& dest_rect,
                                                GdkWindow* target) OVERRIDE;
 #elif defined(OS_MACOSX)
   virtual gfx::Size GetBackingStoreSize() OVERRIDE;
   virtual bool CopyFromBackingStoreToCGContext(const CGRect& dest_rect,
                                                CGContextRef target) OVERRIDE;
 #endif
   virtual void EnableFullAccessibilityMode() OVERRIDE;
   virtual void ForwardMouseEvent(
@@ skipping 780 matching lines @@
   std::queue<base::Callback<void(bool, const SkBitmap&)> > pending_snapshots_;
 
   int64 last_input_number_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_IMPL_H_