Remove unused blink::WebStorageArea::memoryBytesUsedByCache().

third_party/WebKit/Source/modules/storage/StorageArea.cpp

 /*
  * Copyright (C) 2009 Google Inc. All Rights Reserved.
  *           (C) 2008 Apple Inc.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 136 matching lines @@
     StorageNamespaceController* controller = StorageNamespaceController::from(frame->page());
     if (!controller)
         return false;
     bool result = controller->storageClient()->canAccessStorage(frame, m_storageType);
     // Move attention to the new LocalFrame.
     LocalFrameLifecycleObserver::setContext(frame);
     m_canAccessStorageCachedResult = result;
     return result;
 }
 
-size_t StorageArea::memoryBytesUsedByCache()
-{
-    return m_storageArea->memoryBytesUsedByCache();
-}
-
 void StorageArea::dispatchLocalStorageEvent(const String& key, const String& oldValue, const String& newValue, SecurityOrigin* securityOrigin, const KURL& pageURL, WebStorageArea* sourceAreaInstance)
 {
     // Iterate over all pages that have a StorageNamespaceController supplement.
     for (Page* page : Page::ordinaryPages()) {
         for (Frame* frame = page->mainFrame(); frame; frame = frame->tree().traverseNext()) {
             // FIXME: We do not yet have a way to dispatch events to out-of-process frames.
             if (!frame->isLocalFrame())
                 continue;
             LocalFrame* localFrame = toLocalFrame(frame);
             LocalDOMWindow* localWindow = localFrame->localDOMWindow();
@@ skipping 39 matching lines @@
 }
 
 bool StorageArea::isEventSource(Storage* storage, WebStorageArea* sourceAreaInstance)
 {
     ASSERT(storage);
     StorageArea* area = storage->area();
     return area->m_storageArea == sourceAreaInstance;
 }
 
 } // namespace blink