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

public/platform/WebRect.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 50 matching lines @@
 
     WebRect(int x, int y, int width, int height)
         : x(x)
         , y(y)
         , width(width)
         , height(height)
     {
     }
 
 #if INSIDE_BLINK
-    WebRect(const blink::IntRect& r)
+    WebRect(const IntRect& r)
         : x(r.x())
         , y(r.y())
         , width(r.width())
         , height(r.height())
     {
     }
 
-    WebRect& operator=(const blink::IntRect& r)
+    WebRect& operator=(const IntRect& r)
     {
         x = r.x();
         y = r.y();
         width = r.width();
         height = r.height();
         return *this;
     }
 
-    operator blink::IntRect() const
+    operator IntRect() const
     {
-        return blink::IntRect(x, y, width, height);
+        return IntRect(x, y, width, height);
     }
 #else
     WebRect(const gfx::Rect& r)
         : x(r.x())
         , y(r.y())
         , width(r.width())
         , height(r.height())
     {
     }
 
@@ skipping 19 matching lines @@
 }
 
 inline bool operator!=(const WebRect& a, const WebRect& b)
 {
     return !(a == b);
 }
 
 } // namespace blink
 
 #endif