Add OVERRIDE to content/.

content/browser/renderer_host/backing_store_skia.h

Index: content/browser/renderer_host/backing_store_skia.h
diff --git a/content/browser/renderer_host/backing_store_skia.h b/content/browser/renderer_host/backing_store_skia.h
index 5251093c9a19cde8645b4eccd29c418403f841d9..da3a81d664a852bfe42b176a3f4b6af6c83c3f01 100644
--- a/content/browser/renderer_host/backing_store_skia.h
+++ b/content/browser/renderer_host/backing_store_skia.h
@@ -33,19 +33,19 @@ class BackingStoreSkia : public BackingStore {
                                    gfx::Canvas* canvas);
 
   // BackingStore implementation.
-  virtual size_t MemorySize();
+  virtual size_t MemorySize() OVERRIDE;
   virtual void PaintToBackingStore(
       RenderProcessHost* process,
       TransportDIB::Id bitmap,
       const gfx::Rect& bitmap_rect,
       const std::vector<gfx::Rect>& copy_rects,
       const base::Closure& completion_callback,
-      bool* scheduled_completion_callback);
+      bool* scheduled_completion_callback) OVERRIDE;
   virtual bool CopyFromBackingStore(const gfx::Rect& rect,
-                                    skia::PlatformCanvas* output);
+                                    skia::PlatformCanvas* output) OVERRIDE;
   virtual void ScrollBackingStore(int dx, int dy,
                                   const gfx::Rect& clip_rect,
-                                  const gfx::Size& view_size);
+                                  const gfx::Size& view_size) OVERRIDE;
 
  private:
   SkBitmap bitmap_;