Clean up forward declarations in Source/modules

Source/modules/indexeddb/WebIDBCallbacksImpl.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * 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.
  *
@@ skipping 28 matching lines @@
 #include "public/platform/WebIDBCursor.h"
 #include "public/platform/WebIDBDatabase.h"
 #include "public/platform/WebIDBDatabaseError.h"
 #include "public/platform/WebIDBKey.h"
 
 using blink::WebBlobInfo;
 using blink::WebData;
 using blink::WebIDBCursor;
 using blink::WebIDBDatabase;
 using blink::WebIDBDatabaseError;
-using blink::WebIDBIndex;
 using blink::WebIDBKey;
 using blink::WebIDBKeyPath;
 using blink::WebIDBMetadata;
 using blink::WebVector;
 
 namespace blink {
 
 // static
 PassOwnPtr<WebIDBCallbacksImpl> WebIDBCallbacksImpl::create(IDBRequest* request)
 {
@@ skipping 100 matching lines @@
 }
 
 void WebIDBCallbacksImpl::onUpgradeNeeded(long long oldVersion, WebIDBDatabase* database, const WebIDBMetadata& metadata, unsigned short dataLoss, blink::WebString dataLossMessage)
 {
     InspectorInstrumentationCookie cookie = InspectorInstrumentation::traceAsyncCallbackStarting(m_request->executionContext(), m_asyncOperationId);
     m_request->onUpgradeNeeded(oldVersion, adoptPtr(database), metadata, static_cast<blink::WebIDBDataLoss>(dataLoss), dataLossMessage);
     InspectorInstrumentation::traceAsyncCallbackCompleted(cookie);
 }
 
 } // namespace blink