Standardize usage of virtual/override/final specifiers in google_apis/.

google_apis/gcm/engine/unregistration_request_unittest.cc

 // Copyright 2014 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 <map>
 #include <string>
 #include <vector>
 
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_tokenizer.h"
@@ skipping 39 matching lines @@
   -1,
 
   // Don't use initial delay unless the last request was an error.
   false,
 };
 }  // namespace
 
 class UnregistrationRequestTest : public testing::Test {
  public:
   UnregistrationRequestTest();
-  virtual ~UnregistrationRequestTest();
+  ~UnregistrationRequestTest() override;
 
   void UnregistrationCallback(UnregistrationRequest::Status status);
 
   void CreateRequest();
   void SetResponseStatusAndString(net::HttpStatusCode status_code,
                                   const std::string& response_body);
   void CompleteFetch();
 
  protected:
   bool callback_called_;
@@ skipping 215 matching lines @@
   EXPECT_FALSE(callback_called_);
 
   SetResponseStatusAndString(net::HTTP_OK, kDeletedAppId);
   CompleteFetch();
 
   EXPECT_TRUE(callback_called_);
   EXPECT_EQ(UnregistrationRequest::SUCCESS, status_);
 }
 
 }  // namespace gcm