Cleanup namespace usage in public/platform/{Web[P-W]*,linux/*}.h

public/platform/WebSize.h

 /*
  * Copyright (C) 2009 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 45 matching lines @@
     {
     }
 
     WebSize(int width, int height)
         : width(width)
         , height(height)
     {
     }
 
 #if INSIDE_BLINK
-    WebSize(const blink::IntSize& s)
+    WebSize(const IntSize& s)
         : width(s.width())
         , height(s.height())
     {
     }
 
-    WebSize& operator=(const blink::IntSize& s)
+    WebSize& operator=(const IntSize& s)
     {
         width = s.width();
         height = s.height();
         return *this;
     }
 
-    operator blink::IntSize() const
+    operator IntSize() const
     {
-        return blink::IntSize(width, height);
+        return IntSize(width, height);
     }
 #else
     WebSize(const gfx::Size& s)
         : width(s.width())
         , height(s.height())
     {
     }
 
     WebSize(const gfx::Vector2d& v)
         : width(v.x())
@@ skipping 33 matching lines @@
 }
 
 inline bool operator!=(const WebSize& a, const WebSize& b)
 {
     return !(a == b);
 }
 
 } // namespace blink
 
 #endif