Send IndexedDB observations through IDBDatabaseCallbacks.

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>
 
-#include <map>
-#include <string>
-#include <vector>
-
 #include "base/gtest_prod_util.h"
-#include "base/id_map.h"
 #include "base/macros.h"
-#include "base/memory/ref_counted.h"
 #include "base/strings/nullable_string16.h"
 #include "content/child/indexed_db/indexed_db_callbacks_impl.h"
 #include "content/child/indexed_db/indexed_db_database_callbacks_impl.h"
 #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/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 IndexedDBMsg_Observation;
-struct IndexedDBMsg_ObserverChanges;
-
-namespace blink {
-struct WebIDBObservation;
-}
-
 namespace content {
 class WebIDBCursorImpl;
 
 // 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
   // failing a NOTREACHED in ThreadSpecificInstance in tests that instantiate
   // two copies of RenderThreadImpl on the same thread.  Everyone else probably
   // wants to use ThreadSpecificInstance().
   IndexedDBDispatcher();
   ~IndexedDBDispatcher() override;
 
   static IndexedDBDispatcher* ThreadSpecificInstance();
 
   // WorkerThread::Observer implementation.
   void WillStopCurrentWorkerThread() override;
 
-  static std::vector<blink::WebIDBObservation> ConvertObservations(
-      const std::vector<IndexedDBMsg_Observation>& idb_observation);
-
-  void OnMessageReceived(const IPC::Message& msg);
-
-  int32_t RegisterObserver(std::unique_ptr<blink::WebIDBObserver> observer);
-
-  // Removes observers from our local map observers_.
-  void RemoveObservers(const std::vector<int32_t>& observer_ids_to_remove);
-
-  enum { kAllCursors = -1 };
-
   void RegisterCursor(WebIDBCursorImpl* cursor);
   void UnregisterCursor(WebIDBCursorImpl* cursor);
   // Reset cursor prefetch caches for all cursors except exception_cursor.
   void ResetCursorPrefetchCaches(int64_t transaction_id,
                                  WebIDBCursorImpl* exception_cursor);
 
   void RegisterMojoOwnedCallbacks(
       IndexedDBCallbacksImpl::InternalState* callback_state);
   void UnregisterMojoOwnedCallbacks(
       IndexedDBCallbacksImpl::InternalState* callback_state);
   void RegisterMojoOwnedDatabaseCallbacks(
       blink::WebIDBDatabaseCallbacks* callback_state);
   void UnregisterMojoOwnedDatabaseCallbacks(
       blink::WebIDBDatabaseCallbacks* callback_state);
 
  private:
   FRIEND_TEST_ALL_PREFIXES(IndexedDBDispatcherTest, CursorReset);
   FRIEND_TEST_ALL_PREFIXES(IndexedDBDispatcherTest, CursorTransactionId);
 
   static int32_t CurrentWorkerId() { return WorkerThread::GetCurrentId(); }
 
-  // IDBCallback message handlers.
-  void OnDatabaseChanges(int32_t ipc_thread_id,
-                         const IndexedDBMsg_ObserverChanges&);
-
-  IDMap<blink::WebIDBObserver, IDMapOwnPointer> observers_;
   std::unordered_set<WebIDBCursorImpl*> cursors_;
 
   // Holds pointers to the worker-thread owned state of IndexedDBCallbacksImpl
   // and IndexedDBDatabaseCallbacksImpl objects to makes sure that it is
   // destroyed on thread exit if the Mojo pipe is not yet closed. Otherwise the
   // object will leak because the thread's task runner is no longer executing
   // tasks.
   std::unordered_set<IndexedDBCallbacksImpl::InternalState*>
       mojo_owned_callback_state_;
   std::unordered_set<blink::WebIDBDatabaseCallbacks*>
       mojo_owned_database_callback_state_;
 
   DISALLOW_COPY_AND_ASSIGN(IndexedDBDispatcher);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_CHILD_INDEXED_DB_INDEXED_DB_DISPATCHER_H_