Fixes for -Wunused-function on Linux, Android and ChromeOS

chrome/test/base/testing_profile.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 "chrome/test/base/testing_profile.h"
 
 #include "build/build_config.h"
 
 #include "base/base_paths.h"
 #include "base/command_line.h"
@@ skipping 133 matching lines @@
     return BrowserThread::GetMessageLoopProxyForThread(BrowserThread::IO);
   }
 
  protected:
   virtual ~TestExtensionURLRequestContextGetter() {}
 
  private:
   scoped_ptr<net::URLRequestContext> context_;
 };
 
+#if defined(ENABLE_NOTIFICATIONS)
 BrowserContextKeyedService* CreateTestDesktopNotificationService(
     content::BrowserContext* profile) {
-#if defined(ENABLE_NOTIFICATIONS)
   return new DesktopNotificationService(static_cast<Profile*>(profile), NULL);
-#else
-  return NULL;
+}
 #endif
-}
 
 }  // namespace
 
 // static
 #if defined(OS_CHROMEOS)
 // Must be kept in sync with
 // ChromeBrowserMainPartsChromeos::PreEarlyInitialization.
 const char TestingProfile::kTestUserProfileDir[] = "test-user";
 #else
 const char TestingProfile::kTestUserProfileDir[] = "Default";
@@ skipping 728 matching lines @@
 
   return scoped_ptr<TestingProfile>(new TestingProfile(
       path_,
       delegate_,
       extension_policy_,
       pref_service_.Pass(),
       incognito_,
       managed_user_id_,
       testing_factories_));
 }