Make IndexedDBConnection IDs independent from the IPC database ID.

content/common/indexed_db/indexed_db_messages.h

 // Copyright (c) 2012 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.
 
 // Message definition file, included multiple times, hence no include guard.
 
 #include <stdint.h>
 
 #include <map>
 #include <string>
@@ skipping 343 matching lines @@
 IPC_MESSAGE_CONTROL2(IndexedDBMsg_CallbacksSuccessUndefined,
                      int32_t /* ipc_thread_id */,
                      int32_t /* ipc_callbacks_id */)
 IPC_MESSAGE_CONTROL4(IndexedDBMsg_CallbacksError,
                      int32_t /* ipc_thread_id */,
                      int32_t /* ipc_callbacks_id */,
                      int /* code */,
                      base::string16 /* message */)
 
 // IDBDatabaseCallback message handlers
-IPC_MESSAGE_CONTROL3(IndexedDBMsg_DatabaseCallbacksChanges,
+IPC_MESSAGE_CONTROL2(IndexedDBMsg_DatabaseCallbacksChanges,
                      int32_t, /* ipc_thread_id */
-                     int32_t, /* ipc_database_id */
                      IndexedDBMsg_ObserverChanges)
 
 // Indexed DB messages sent from the renderer to the browser.
 
 // WebIDBCursor::advance() message.
 IPC_MESSAGE_CONTROL4(IndexedDBHostMsg_CursorAdvance,
                      int32_t,  /* ipc_cursor_id */
                      int32_t,  /* ipc_thread_id */
                      int32_t,  /* ipc_callbacks_id */
                      uint32_t) /* count */
@@ skipping 132 matching lines @@
                      int64_t) /* transaction_id */
 
 // WebIDBDatabase::commit() message.
 IPC_MESSAGE_CONTROL2(IndexedDBHostMsg_DatabaseCommit,
                      int32_t, /* ipc_database_id */
                      int64_t) /* transaction_id */
 
 // WebIDBDatabase::~WebIDBCursor() message.
 IPC_MESSAGE_CONTROL1(IndexedDBHostMsg_CursorDestroyed,
                      int32_t /* ipc_cursor_id */)