Move lots of GMock stuff out of line.

chrome/common/notification_observer_mock.h

Index: chrome/common/notification_observer_mock.h
diff --git a/chrome/common/notification_observer_mock.h b/chrome/common/notification_observer_mock.h
index 0385f26e406519ce06197397584e80f7196d7931..e2329283745a47167867d10ee95e3a40d3fe9d13 100644
--- a/chrome/common/notification_observer_mock.h
+++ b/chrome/common/notification_observer_mock.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2009 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.
 
@@ -15,8 +15,8 @@ class NotificationSource;
 
 class NotificationObserverMock : public NotificationObserver {
  public:
-  NotificationObserverMock() {}
-  virtual ~NotificationObserverMock() {}
+  NotificationObserverMock();
+  virtual ~NotificationObserverMock();
 
   MOCK_METHOD3(Observe, void(NotificationType type,
                              const NotificationSource& source,