Cleanup namespace usage in Source/binding and Source/web

Source/web/painting/ContinuousPainter.h

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  * 1. Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *
@@ skipping 13 matching lines @@
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef ContinuousPainter_h
 #define ContinuousPainter_h
 
 namespace blink {
 class GraphicsLayer;
-}
-
-namespace blink {
 class PageOverlayList;
 
 // This class is responsible for calling setNeedsDisplay on all
 // GraphicsLayers in continuous painting mode.
 class ContinuousPainter {
 public:
     // Calls setNeedsDisplay on the layer, then recursively calls
     // on mask layers, replica layers and all child layers.
     // Overlays are excluded, because they impact the page paint time metric.
-    static void setNeedsDisplayRecursive(blink::GraphicsLayer*, PageOverlayList*);
+    static void setNeedsDisplayRecursive(GraphicsLayer*, PageOverlayList*);
 };
 
 } // namespace blink
 
 #endif