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

content/renderer/dom_operations_browsertest.cc

 // Copyright (c) 2012 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 "base/bind.h"
 #include "base/command_line.h"
 #include "base/files/file_path.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/common/content_switches.h"
 #include "content/public/renderer/render_view.h"
 #include "content/shell/shell.h"
 #include "content/test/content_browser_test.h"
 #include "content/test/content_browser_test_utils.h"
 #include "net/base/net_util.h"
 #include "webkit/glue/dom_operations.h"
 
 namespace content {
 
 class DomOperationsTests : public ContentBrowserTest {
  public:
-  virtual void SetUpCommandLine(CommandLine* command_line) {
+  virtual void SetUpCommandLine(CommandLine* command_line) OVERRIDE {
     command_line->AppendSwitch(switches::kSingleProcess);
 #if defined(OS_WIN) && defined(USE_AURA)
     // Don't want to try to create a GPU process.
     command_line->AppendSwitch(switches::kDisableAcceleratedCompositing);
 #endif
   }
 
   // Test function GetAllSavableResourceLinksForCurrentPage with a web page.
   // We expect result of GetAllSavableResourceLinksForCurrentPage exactly
   // matches expected_resources_set.
@@ skipping 98 matching lines @@
     expected_resources_set.insert(
         net::FilePathToFileURL(expected_frame_url));
   }
 
   base::FilePath page_file_path =
       GetTestFilePath("dom_serializer", "youtube_2.htm");
   GetSavableResourceLinksForPage(page_file_path, expected_resources_set);
 }
 
 }  // namespace content