Cleanup namespace usage in Source/web/*.h

Source/web/PageOverlayList.h

Index: Source/web/PageOverlayList.h
diff --git a/Source/web/PageOverlayList.h b/Source/web/PageOverlayList.h
index 4af7b256fb859f4ca9c66e483261c865d21ec1ef..779a7db74d9a4d4bf90b5b475a07e656f639c1db 100644
--- a/Source/web/PageOverlayList.h
+++ b/Source/web/PageOverlayList.h
@@ -34,11 +34,9 @@
 #include "wtf/Vector.h"
 
 namespace blink {
+
 class GraphicsContext;
 class GraphicsLayer;
-}
-
-namespace blink {
 class PageOverlay;
 class WebPageOverlay;
 class WebViewImpl;
@@ -57,9 +55,9 @@ public:
     bool remove(WebPageOverlay*);
 
     void update();
-    void paintWebFrame(blink::GraphicsContext&);
+    void paintWebFrame(GraphicsContext&);
 
-    size_t findGraphicsLayer(blink::GraphicsLayer*);
+    size_t findGraphicsLayer(GraphicsLayer*);
 
 private:
     typedef Vector<OwnPtr<PageOverlay>, 2> PageOverlays;