Clean up remaining uses of WebCore namespace

Source/modules/serviceworkers/CacheStorage.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "config.h"
 #include "modules/serviceworkers/CacheStorage.h"
 
 #include "bindings/core/v8/ScriptPromiseResolver.h"
 #include "bindings/core/v8/ScriptState.h"
 
-namespace WebCore {
+namespace blink {
 
 PassRefPtrWillBeRawPtr<CacheStorage> CacheStorage::create()
 {
     return adoptRefWillBeNoop(new CacheStorage());
 }
 
 // FIXME: Implement every one of these methods.
 ScriptPromise CacheStorage::createFunction(ScriptState* scriptState, const String& key)
 {
     RefPtr<ScriptPromiseResolver> resolver = ScriptPromiseResolver::create(scriptState);
@@ skipping 42 matching lines @@
     resolver->reject("not implemented");
 
     return promise;
 }
 
 CacheStorage::CacheStorage()
 {
     ScriptWrappable::init(this);
 }
 
-} // namespace WebCore
+} // namespace blink