Warn on missing OVERRIDE/virtual everywhere, not just in header files.

ui/message_center/views/message_center_view_unittest.cc

 // Copyright 2013 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 <map>
 
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/utf_string_conversions.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ skipping 22 matching lines @@
    public:
     virtual void RegisterCall(int receiver_id, CallType type) = 0;
   };
 
   explicit MockNotificationView(const Notification& notification,
                                 MessageCenter* message_center,
                                 Test* test,
                                 int view_id);
   virtual ~MockNotificationView();
 
-  virtual gfx::Size GetPreferredSize();
-  virtual int GetHeightForWidth(int w);
-  virtual void Layout();
+  virtual gfx::Size GetPreferredSize() OVERRIDE;
+  virtual int GetHeightForWidth(int w) OVERRIDE;
+  virtual void Layout() OVERRIDE;
 
   int get_id() { return id_; };
 
  private:
   void RegisterCall(CallType type);
 
   Test* test_;
   int id_;
 
   DISALLOW_COPY_AND_ASSIGN(MockNotificationView);
@@ skipping 41 matching lines @@
   MessageCenterViewTest();
   virtual ~MessageCenterViewTest();
 
   virtual void SetUp() OVERRIDE;
   virtual void TearDown() OVERRIDE;
 
   MessageCenterView* GetMessageCenterView();
   int GetNotificationCount();
   int GetCallCount(CallType type);
 
-  void RegisterCall(int receiver_id, CallType type);
+  virtual void RegisterCall(int receiver_id, CallType type) OVERRIDE;
 
   void LogBounds(int depth, views::View* view);
 
  private:
   views::View* MakeParent(views::View* child1, views::View* child2);
 
 
   scoped_ptr<MessageCenterView> message_center_view_;
   FakeMessageCenter message_center_;
   std::map<CallType,int> callCounts_;
@@ skipping 77 matching lines @@
   // GetHeightForWidth() calls per descendant NotificationView. 20 is a very
   // large number corresponding to the current reality. That number will be
   // ratcheted down over time as the code improves.
   EXPECT_LE(GetCallCount(LAYOUT), GetNotificationCount() * 2);
   EXPECT_LE(GetCallCount(GET_PREFERRED_SIZE) +
             GetCallCount(GET_HEIGHT_FOR_WIDTH),
             GetNotificationCount() * 20);
 }
 
 }  // namespace message_center