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

content/renderer/resource_fetcher_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 "webkit/glue/resource_fetcher.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/command_line.h"
 #include "base/message_loop.h"
@@ skipping 103 matching lines @@
     fetcher_.reset();
     FetcherDelegate::OnURLFetchComplete(response, data);
   }
 
  private:
   scoped_ptr<ResourceFetcher> fetcher_;
 };
 
 class ResourceFetcherTests : 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
   }
 
   RenderView* GetRenderView() {
     // We could have the test on the UI thread get the WebContent's routing ID,
     // but we know this will be the first RV so skip that and just hardcode it.
@@ skipping 140 matching lines @@
   ASSERT_TRUE(test_server()->Start());
   GURL url(test_server()->GetURL("slow?1"));
 
   PostTaskToInProcessRendererAndWait(
         base::Bind(
             &ResourceFetcherTests::ResourceFetcherDeletedInCallbackOnRenderer,
             base::Unretained(this), url));
 }
 
 }  // namespace content