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

public/platform/WebIDBKey.h

Index: public/platform/WebIDBKey.h
diff --git a/public/platform/WebIDBKey.h b/public/platform/WebIDBKey.h
index a26c81f2cd9453ad87558ae37f3cd9ff09b3bfed..2aba653a01f30263d7e8a0b76fab0179f75d79e0 100644
--- a/public/platform/WebIDBKey.h
+++ b/public/platform/WebIDBKey.h
@@ -33,10 +33,10 @@
 #include "WebString.h"
 #include "WebVector.h"
 
-namespace blink { class IDBKey; }
-
 namespace blink {
 
+class IDBKey;
+
 class WebIDBKey {
 public:
     // Please use one of the factory methods. This is public only to allow WebVector.
@@ -77,13 +77,13 @@ public:
     BLINK_EXPORT double number() const; // Only valid for NumberType.
 
 #if BLINK_IMPLEMENTATION
-    WebIDBKey(blink::IDBKey*);
-    WebIDBKey& operator=(blink::IDBKey*);
-    operator blink::IDBKey*() const;
+    WebIDBKey(IDBKey*);
+    WebIDBKey& operator=(IDBKey*);
+    operator IDBKey*() const;
 #endif
 
 private:
-    WebPrivatePtr<blink::IDBKey> m_private;
+    WebPrivatePtr<IDBKey> m_private;
 };
 
 } // namespace blink