Move lots of GMock stuff out of line.

media/base/mock_filter_host.cc

Index: media/base/mock_filter_host.cc
diff --git a/media/base/mock_filter_host.cc b/media/base/mock_filter_host.cc
new file mode 100644
index 0000000000000000000000000000000000000000..9c5e184ea47afa344d6793c42c41fce95b4f9617
--- /dev/null
+++ b/media/base/mock_filter_host.cc
@@ -0,0 +1,13 @@
+// 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.
+
+#include "media/base/mock_filter_host.h"
+
+namespace media {
+
+MockFilterHost::MockFilterHost() {}
+
+MockFilterHost::~MockFilterHost() {}
+
+}  // namespace media