Enable Clang warnings in .cc files for Linux+[Aura/ChromeOS]

chrome/browser/extensions/platform_app_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/file_util.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/prefs/pref_service.h"
 #include "base/stl_util.h"
 #include "base/test/test_timeouts.h"
@@ skipping 918 matching lines @@
     command_line->AppendSwitch(switches::kIncognito);
     PlatformAppBrowserTest::SetUpCommandLine(command_line);
   }
   virtual void SetUp() OVERRIDE {
     // Make sure the file manager actually gets loaded.
     ComponentLoader::EnableBackgroundExtensionsForTesting();
     PlatformAppBrowserTest::SetUp();
   }
 
   // ShellWindowRegistry::Observer implementation.
-  virtual void OnShellWindowAdded(ShellWindow* shell_window) {
+  virtual void OnShellWindowAdded(ShellWindow* shell_window) OVERRIDE {
     opener_app_ids_.insert(shell_window->extension()->id());
   }
-  virtual void OnShellWindowIconChanged(ShellWindow* shell_window) {}
-  virtual void OnShellWindowRemoved(ShellWindow* shell_window) {}
+  virtual void OnShellWindowIconChanged(ShellWindow* shell_window) OVERRIDE {}
+  virtual void OnShellWindowRemoved(ShellWindow* shell_window) OVERRIDE {}
 
  protected:
   // A set of ids of apps we've seen open a shell window.
   std::set<std::string> opener_app_ids_;
 };
 
 IN_PROC_BROWSER_TEST_F(PlatformAppIncognitoBrowserTest, IncognitoComponentApp) {
   // Get the file manager app.
   const Extension* file_manager = extension_service()->GetExtensionById(
       "hhaomjibdihmijegdhdafkllkbggdgoj", false);
@@ skipping 20 matching lines @@
 
   while (!ContainsKey(opener_app_ids_, file_manager->id())) {
     content::RunAllPendingInMessageLoop();
   }
 }
 
 #endif  // defined(OS_CHROMEOS)
 
 
 }  // namespace extensions