Enable Clang warnings for implementation files on all platforms.

chrome/browser/history/android/android_provider_backend_unittest.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/browser/history/android/android_provider_backend.h"
 
 #include <vector>
 
 #include "base/file_util.h"
 #include "base/files/file_path.h"
@@ skipping 96 matching lines @@
 
 class AndroidProviderBackendTest : public testing::Test {
  public:
   AndroidProviderBackendTest()
       : profile_manager_(
           TestingBrowserProcess::GetGlobal()),
         bookmark_model_(NULL),
         ui_thread_(BrowserThread::UI, &message_loop_),
         file_thread_(BrowserThread::FILE, &message_loop_) {
   }
-  ~AndroidProviderBackendTest() {
-  }
+  virtual ~AndroidProviderBackendTest() {}
 
  protected:
   virtual void SetUp() OVERRIDE {
     // Setup the testing profile, so the bookmark_model_sql_handler could
     // get the bookmark model from it.
     ASSERT_TRUE(profile_manager_.SetUp());
     // It seems that the name has to be chrome::kInitialProfile, so it
     // could be found by ProfileManager::GetLastUsedProfile().
     TestingProfile* testing_profile = profile_manager_.CreateTestingProfile(
         chrome::kInitialProfile);
@@ skipping 1942 matching lines @@
                                                  update_args, &update_count));
   // Verify notifications.
   EXPECT_FALSE(delegate_.deleted_details());
   ASSERT_TRUE(delegate_.modified_details());
   ASSERT_EQ(1u, delegate_.modified_details()->changed_urls.size());
   // No favicon will be updated as thumbnail database is missing.
   EXPECT_FALSE(delegate_.favicon_details());
 }
 
 }  // namespace history