Cleanup namespace usage in public/platform/Web[A-M]*.h.

public/platform/WebFloatSize.h

Index: public/platform/WebFloatSize.h
diff --git a/public/platform/WebFloatSize.h b/public/platform/WebFloatSize.h
index 902a70656ee049ca346390fe5623b2b692709663..e43c3c7777c6abd1279eadfac4a325f6b4265e0a 100644
--- a/public/platform/WebFloatSize.h
+++ b/public/platform/WebFloatSize.h
@@ -64,22 +64,22 @@ struct WebFloatSize {
     }
 
 #if INSIDE_BLINK
-    WebFloatSize(const blink::FloatSize& s)
+    WebFloatSize(const FloatSize& s)
         : width(s.width())
         , height(s.height())
     {
     }
 
-    WebFloatSize& operator=(const blink::FloatSize& s)
+    WebFloatSize& operator=(const FloatSize& s)
     {
         width = s.width();
         height = s.height();
         return *this;
     }
 
-    operator blink::FloatSize() const
+    operator FloatSize() const
     {
-        return blink::FloatSize(width, height);
+        return FloatSize(width, height);
     }
 #else
     WebFloatSize(const gfx::SizeF& s)