Allow MessageFilters to restrict listening to specific message classes

content/browser/quota_dispatcher_host.cc

 // 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.
 
 #include "content/browser/quota_dispatcher_host.h"
 
 #include "base/bind.h"
 #include "base/memory/weak_ptr.h"
 #include "base/numerics/safe_conversions.h"
 #include "content/common/quota_messages.h"
 #include "content/public/browser/quota_permission_context.h"
 #include "net/base/net_util.h"
 #include "url/gurl.h"
 #include "webkit/browser/quota/quota_manager.h"
 
 using quota::QuotaClient;
 using quota::QuotaManager;
 using quota::QuotaStatusCode;
 using quota::StorageType;
 
 namespace content {
+namespace {
+const uint32 kFilteredMessageClasses[] = {
+  QuotaMsgStart,
+};
+}  // namespace
 
 // Created one per request to carry the request's request_id around.
 // Dispatches requests from renderer/worker to the QuotaManager and
 // sends back the response to the renderer/worker.
 class QuotaDispatcherHost::RequestDispatcher {
  public:
   RequestDispatcher(base::WeakPtr<QuotaDispatcherHost> dispatcher_host,
                     int request_id)
       : dispatcher_host_(dispatcher_host),
         render_process_id_(dispatcher_host->process_id_),
@@ skipping 182 matching lines @@
   int64 current_quota_;
   int64 requested_quota_;
   const int render_view_id_;
   base::WeakPtrFactory<self_type> weak_factory_;
 };
 
 QuotaDispatcherHost::QuotaDispatcherHost(
     int process_id,
     QuotaManager* quota_manager,
     QuotaPermissionContext* permission_context)
-    : process_id_(process_id),
+    : BrowserMessageFilter(
+          kFilteredMessageClasses, arraysize(kFilteredMessageClasses)),
+      process_id_(process_id),
       quota_manager_(quota_manager),
       permission_context_(permission_context),
       weak_factory_(this) {
 }
 
 bool QuotaDispatcherHost::OnMessageReceived(
     const IPC::Message& message, bool* message_was_ok) {
   *message_was_ok = true;
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP_EX(QuotaDispatcherHost, message, *message_was_ok)
@@ skipping 30 matching lines @@
     return;
   }
 
   RequestQuotaDispatcher* dispatcher = new RequestQuotaDispatcher(
       weak_factory_.GetWeakPtr(), request_id, origin, type,
       requested_size, render_view_id);
   dispatcher->Start();
 }
 
 }  // namespace content