Add support for passing an arbitrary parameter to an IPC message handler. The motivation is for Web…

content/browser/renderer_host/media/audio_renderer_host_unittest.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 "base/bind.h"
 #include "base/command_line.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/run_loop.h"
 #include "base/sync_socket.h"
 #include "content/browser/media/capture/audio_mirroring_manager.h"
@@ skipping 71 matching lines @@
   // these messages here and dispatch to our mock methods to verify the
   // conversation between this object and the renderer.
   virtual bool Send(IPC::Message* message) {
     CHECK(message);
 
     // In this method we dispatch the messages to the according handlers as if
     // we are the renderer.
     bool handled = true;
     IPC_BEGIN_MESSAGE_MAP(MockAudioRendererHost, *message)
       IPC_MESSAGE_HANDLER(AudioMsg_NotifyStreamCreated,
-                          OnStreamCreated)
+                          OnNotifyStreamCreated)
       IPC_MESSAGE_HANDLER(AudioMsg_NotifyStreamStateChanged,
-                          OnStreamStateChanged)
+                          OnNotifyStreamStateChanged)
       IPC_MESSAGE_UNHANDLED(handled = false)
     IPC_END_MESSAGE_MAP()
     EXPECT_TRUE(handled);
 
     delete message;
     return true;
   }
 
-  void OnStreamCreated(const IPC::Message& msg,
-                       int stream_id,
-                       base::SharedMemoryHandle handle,
+  void OnNotifyStreamCreated(int stream_id,
+                             base::SharedMemoryHandle handle,
 #if defined(OS_WIN)
-                       base::SyncSocket::Handle socket_handle,
+                             base::SyncSocket::Handle socket_handle,
 #else
-                       base::FileDescriptor socket_descriptor,
+                             base::FileDescriptor socket_descriptor,
 #endif
-                       uint32 length) {
+                             uint32 length) {
     // Maps the shared memory.
     shared_memory_.reset(new base::SharedMemory(handle, false));
     CHECK(shared_memory_->Map(length));
     CHECK(shared_memory_->memory());
     shared_memory_length_ = length;
 
     // Create the SyncSocket using the handle.
     base::SyncSocket::Handle sync_socket_handle;
 #if defined(OS_WIN)
     sync_socket_handle = socket_handle;
 #else
     sync_socket_handle = socket_descriptor.fd;
 #endif
     sync_socket_.reset(new base::SyncSocket(sync_socket_handle));
 
     // And then delegate the call to the mock method.
     OnStreamCreated(stream_id, length);
   }
 
-  void OnStreamStateChanged(const IPC::Message& msg,
-                            int stream_id,
-                            media::AudioOutputIPCDelegate::State state) {
+  void OnNotifyStreamStateChanged(int stream_id,
+                                  media::AudioOutputIPCDelegate::State state) {
     switch (state) {
       case media::AudioOutputIPCDelegate::kPlaying:
         OnStreamPlaying(stream_id);
         break;
       case media::AudioOutputIPCDelegate::kPaused:
         OnStreamPaused(stream_id);
         break;
       case media::AudioOutputIPCDelegate::kError:
         OnStreamError(stream_id);
         break;
@@ skipping 204 matching lines @@
 }
 
 TEST_F(AudioRendererHostTest, CreateUnifiedStreamAndClose) {
   Create(true);
   Close();
 }
 
 // TODO(hclam): Add tests for data conversation in low latency mode.
 
 }  // namespace content