Revert "Allow MessageFilters to restrict listening to specific message classes"

content/browser/indexed_db/indexed_db_dispatcher_host.cc

 // 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.
 
 #include "content/browser/indexed_db/indexed_db_dispatcher_host.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/files/file_path.h"
 #include "base/process/process.h"
@@ skipping 15 matching lines @@
 #include "webkit/browser/database/database_util.h"
 #include "webkit/common/database/database_identifier.h"
 
 using webkit_database::DatabaseUtil;
 using blink::WebIDBKey;
 
 namespace content {
 
 IndexedDBDispatcherHost::IndexedDBDispatcherHost(
     IndexedDBContextImpl* indexed_db_context)
-    : BrowserMessageFilter(IndexedDBMsgStart),
-      indexed_db_context_(indexed_db_context),
+    : indexed_db_context_(indexed_db_context),
       database_dispatcher_host_(new DatabaseDispatcherHost(this)),
       cursor_dispatcher_host_(new CursorDispatcherHost(this)) {
   DCHECK(indexed_db_context_);
 }
 
 IndexedDBDispatcherHost::~IndexedDBDispatcherHost() {}
 
 void IndexedDBDispatcherHost::OnChannelClosing() {
   bool success = indexed_db_context_->TaskRunner()->PostTask(
       FROM_HERE,
@@ skipping 795 matching lines @@
 }
 
 void IndexedDBDispatcherHost::CursorDispatcherHost::OnDestroyed(
     int32 ipc_object_id) {
   DCHECK(
       parent_->indexed_db_context_->TaskRunner()->RunsTasksOnCurrentThread());
   parent_->DestroyObject(&map_, ipc_object_id);
 }
 
 }  // namespace content