content: Cleanup class/struct forward declarations

content/child/indexed_db/indexed_db_dispatcher.h

 // Copyright 2013 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.
 
 #ifndef CONTENT_CHILD_INDEXED_DB_INDEXED_DB_DISPATCHER_H_
 #define CONTENT_CHILD_INDEXED_DB_INDEXED_DB_DISPATCHER_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 11 matching lines @@
 #include "content/common/content_export.h"
 #include "content/common/indexed_db/indexed_db_constants.h"
 #include "content/public/child/worker_thread.h"
 #include "ipc/ipc_sync_message_filter.h"
 #include "third_party/WebKit/public/platform/WebBlobInfo.h"
 #include "third_party/WebKit/public/platform/modules/indexeddb/WebIDBCallbacks.h"
 #include "third_party/WebKit/public/platform/modules/indexeddb/WebIDBObserver.h"
 #include "third_party/WebKit/public/platform/modules/indexeddb/WebIDBTypes.h"
 #include "url/origin.h"
 
-struct IndexedDBDatabaseMetadata;
 struct IndexedDBMsg_CallbacksSuccessCursorContinue_Params;
 struct IndexedDBMsg_CallbacksSuccessCursorPrefetch_Params;
 struct IndexedDBMsg_CallbacksSuccessIDBCursor_Params;
 struct IndexedDBMsg_CallbacksSuccessArray_Params;
 struct IndexedDBMsg_CallbacksSuccessValue_Params;
-struct IndexedDBMsg_CallbacksUpgradeNeeded_Params;
 struct IndexedDBMsg_Observation;
 struct IndexedDBMsg_ObserverChanges;
 
 namespace blink {
 class WebData;
 struct WebIDBObservation;
 }
 
 namespace content {
 class IndexedDBKey;
-class IndexedDBKeyPath;
 class IndexedDBKeyRange;
 class WebIDBCursorImpl;
 class WebIDBDatabaseImpl;
 class ThreadSafeSender;
 
 // Handle the indexed db related communication for this context thread - the
 // main thread and each worker thread have their own copies.
 class CONTENT_EXPORT IndexedDBDispatcher : public WorkerThread::Observer {
  public:
   // Constructor made public to allow RenderThreadImpl to own a copy without
@@ skipping 214 matching lines @@
   std::map<int32_t, WebIDBCursorImpl*> cursors_;
 
   std::map<int32_t, WebIDBDatabaseImpl*> databases_;
 
   DISALLOW_COPY_AND_ASSIGN(IndexedDBDispatcher);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_CHILD_INDEXED_DB_INDEXED_DB_DISPATCHER_H_