Move lots of GMock stuff out of line.

media/base/mock_filter_host.h

Index: media/base/mock_filter_host.h
diff --git a/media/base/mock_filter_host.h b/media/base/mock_filter_host.h
index 904385433f281d95e9a97125fd182f7bbcd2af05..aecc3f68da6f47f44b834853ab1987cb8d148d19 100644
--- a/media/base/mock_filter_host.h
+++ b/media/base/mock_filter_host.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Copyright (c) 2011 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.
 //
@@ -19,7 +19,8 @@ namespace media {
 
 class MockFilterHost : public FilterHost {
  public:
-  MockFilterHost() {}
+  MockFilterHost();
+  virtual ~MockFilterHost();
 
   // FilterHost implementation.
   MOCK_METHOD0(InitializationComplete, void());