Refactor the render widget unittest so it can be reused to create a render vi...

chrome/renderer/render_thread.h

 // Copyright (c) 2006-2008 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 CHROME_RENDERER_RENDER_THREAD_H_
 #define CHROME_RENDERER_RENDER_THREAD_H_
 
 #include "base/ref_counted.h"
 #include "base/shared_memory.h"
 #include "base/task.h"
 #include "base/thread.h"
 #include "chrome/common/ipc_sync_channel.h"
 #include "chrome/common/message_router.h"
 
 class SkBitmap;
 class Task;
 class VisitedLinkSlave;
 struct WebPreferences;
 class RenderDnsMaster;
 class NotificationService;
 class GreasemonkeySlave;
 
-// The RenderThreadBase is the minimal interface that a RenderWidget expects
-// from a render thread. The interface basically abstracts a way to send and
-// receive messages. It is currently only used for testing.
+// The RenderThreadBase is the minimal interface that a RenderView/Widget
+// expects from a render thread. The interface basically abstracts a way to send
+// and receive messages.
 class RenderThreadBase : public IPC::Message::Sender {
  public:
   virtual ~RenderThreadBase() {}
 
   // True if currently sending a message.
   virtual bool InSend() const = 0;
 
   // Called to add or remove a listener for a particular message routing ID.
   // These methods normally get delegated to a MessageRouter.
   virtual void AddRoute(int32 routing_id, IPC::Channel::Listener* listener) = 0;
   virtual void RemoveRoute(int32 routing_id) = 0;
+
+  virtual void AddFilter(IPC::ChannelProxy::MessageFilter* filter) = 0;
+  virtual void RemoveFilter(IPC::ChannelProxy::MessageFilter* filter) = 0;
 };
 
 // The RenderThread class represents a background thread where RenderView
 // instances live.  The RenderThread supports an API that is used by its
 // consumer to talk indirectly to the RenderViews and supporting objects.
 // Likewise, it provides an API for the RenderViews to talk back to the main
 // process (i.e., their corresponding WebContents).
 //
 // Most of the communication occurs in the form of IPC messages.  They are
 // routed to the RenderThread according to the routing IDs of the messages.
 // The routing IDs correspond to RenderView instances.
 class RenderThread : public IPC::Channel::Listener,
                      public RenderThreadBase,
                      public base::Thread {
  public:
   RenderThread(const std::wstring& channel_name);
   virtual ~RenderThread();
 
   // IPC::Channel::Listener implementation:
   virtual void OnMessageReceived(const IPC::Message& msg);
   virtual void OnChannelError();
 
   // IPC::Message::Sender implementation:
   virtual bool Send(IPC::Message* msg);
 
-  void AddFilter(IPC::ChannelProxy::MessageFilter* filter);
-  void RemoveFilter(IPC::ChannelProxy::MessageFilter* filter);
+  // Overridded from RenderThreadBase.
+  virtual void AddFilter(IPC::ChannelProxy::MessageFilter* filter);
+  virtual void RemoveFilter(IPC::ChannelProxy::MessageFilter* filter);
 
   // Gets the VisitedLinkSlave instance for this thread
   VisitedLinkSlave* visited_link_slave() const { return visited_link_slave_; }
 
   // Gets the GreasemonkeySlave instance for this thread
   GreasemonkeySlave* greasemonkey_slave() const { return greasemonkey_slave_; }
 
   // Do DNS prefetch resolution of a hostname.
   void Resolve(const char* name, size_t length);
 
@@ skipping 60 matching lines @@
   int in_send_;
 
   DISALLOW_EVIL_CONSTRUCTORS(RenderThread);
 };
 
 // The global RenderThread object for this process. Note that this should only
 // be accessed when running on the render thread itself.
 extern RenderThread* g_render_thread;
 
 #endif  // CHROME_RENDERER_RENDER_THREAD_H_