Pepper audio basic functionality unit test, take 3.

chrome/renderer/mock_render_thread.h

Index: chrome/renderer/mock_render_thread.h
diff --git a/chrome/renderer/mock_render_thread.h b/chrome/renderer/mock_render_thread.h
index 4f3b1d9322a1fac72ff9228465c0e752fa167354..03fe08f7eb48e9f1dcc54cbe6b2d3e3952418a82 100644
--- a/chrome/renderer/mock_render_thread.h
+++ b/chrome/renderer/mock_render_thread.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2009 The Chromium Authors. All rights reserved.
+// Copyright (c) 2010 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.
 
@@ -40,9 +40,9 @@ class MockRenderThread : public RenderThreadBase {
   // class.
   virtual bool Send(IPC::Message* msg);
 
-  // Our mock thread doesn't do filtering.
-  virtual void AddFilter(IPC::ChannelProxy::MessageFilter* filter) { }
-  virtual void RemoveFilter(IPC::ChannelProxy::MessageFilter* filter) { }
+  // Filtering support.
+  virtual void AddFilter(IPC::ChannelProxy::MessageFilter* filter);
+  virtual void RemoveFilter(IPC::ChannelProxy::MessageFilter* filter);
 
   // Our mock thread doesn't deal with hidden and restored tabs.
   virtual void WidgetHidden() { }