Add OVERRIDE to content/.

content/browser/renderer_host/backing_store_win.h

Index: content/browser/renderer_host/backing_store_win.h
diff --git a/content/browser/renderer_host/backing_store_win.h b/content/browser/renderer_host/backing_store_win.h
index b5910f2b22a3145ddc00dfb5501f32fd7fe5930f..6690cc2652f83da632101752db54e268ea0c904c 100644
--- a/content/browser/renderer_host/backing_store_win.h
+++ b/content/browser/renderer_host/backing_store_win.h
@@ -22,18 +22,19 @@ class BackingStoreWin : public BackingStore {
   static bool ColorManagementEnabled();
 
   // BackingStore implementation.
-  virtual size_t MemorySize();
-  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);
+  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) 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:
   // The backing store dc.