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

public/platform/WebIDBKeyPath.h

Index: public/platform/WebIDBKeyPath.h
diff --git a/public/platform/WebIDBKeyPath.h b/public/platform/WebIDBKeyPath.h
index a5d6ad758e5f525045a7c08f7be18a14bbb29127..e15c6f2b7ffd598ca77d11ef104050aa9da14c55 100644
--- a/public/platform/WebIDBKeyPath.h
+++ b/public/platform/WebIDBKeyPath.h
@@ -32,10 +32,10 @@
 #include "WebString.h"
 #include "WebVector.h"
 
-namespace blink { class IDBKeyPath; }
-
 namespace blink {
 
+class IDBKeyPath;
+
 class WebIDBKeyPath {
 public:
     BLINK_EXPORT static WebIDBKeyPath create(const WebString&);
@@ -59,13 +59,13 @@ public:
     BLINK_EXPORT WebString string() const; // Only valid for StringType.
 
 #if BLINK_IMPLEMENTATION
-    WebIDBKeyPath(const blink::IDBKeyPath&);
-    WebIDBKeyPath& operator=(const blink::IDBKeyPath&);
-    operator const blink::IDBKeyPath&() const;
+    WebIDBKeyPath(const IDBKeyPath&);
+    WebIDBKeyPath& operator=(const IDBKeyPath&);
+    operator const IDBKeyPath&() const;
 #endif
 
 private:
-    WebPrivateOwnPtr<blink::IDBKeyPath> m_private;
+    WebPrivateOwnPtr<IDBKeyPath> m_private;
 };
 
 } // namespace blink