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

public/web/WebDOMFileSystem.h

Index: public/web/WebDOMFileSystem.h
diff --git a/public/web/WebDOMFileSystem.h b/public/web/WebDOMFileSystem.h
index e647546b94aee38b130093d9b5a46ebb26e7e62f..34520fd5679aad1725ac8062ed4e5d206cb5b01f 100644
--- a/public/web/WebDOMFileSystem.h
+++ b/public/web/WebDOMFileSystem.h
@@ -48,10 +48,10 @@ class Value;
 template <class T> class Handle;
 }
 
-namespace blink { class DOMFileSystem; }
-
 namespace blink {
 
+class DOMFileSystem;
+
 class WebDOMFileSystem {
 public:
     enum SerializableType {
@@ -102,12 +102,12 @@ public:
     bool isNull() const { return m_private.isNull(); }
 
 #if BLINK_IMPLEMENTATION
-    WebDOMFileSystem(blink::DOMFileSystem*);
-    WebDOMFileSystem& operator=(blink::DOMFileSystem*);
+    WebDOMFileSystem(DOMFileSystem*);
+    WebDOMFileSystem& operator=(DOMFileSystem*);
 #endif
 
 private:
-    WebPrivatePtr<blink::DOMFileSystem> m_private;
+    WebPrivatePtr<DOMFileSystem> m_private;
 };
 
 } // namespace blink