Update {virtual,override} to follow C++11 style in media.

media/cdm/ppapi/cdm_file_io_test.h

 // Copyright 2013 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.
 
 #ifndef MEDIA_CDM_PPAPI_CDM_FILE_IO_TEST_H_
 #define MEDIA_CDM_PPAPI_CDM_FILE_IO_TEST_H_
 
 #include <list>
 #include <stack>
 #include <string>
@@ skipping 44 matching lines @@
     ACTION_READ,
     RESULT_READ,
     ACTION_WRITE,
     RESULT_WRITE,
     ACTION_CLOSE  // If ACTION_CLOSE is not specified, FileIO::Close() will be
                   // automatically called at the end of the test.
   };
 
   FileIOTest(const CreateFileIOCB& create_file_io_cb,
              const std::string& test_name);
-  ~FileIOTest();
+  ~FileIOTest() override;
 
   // Adds a test step in this test. |this| object doesn't take the ownership of
   // |data|, which should be valid throughout the lifetime of |this| object.
   void AddTestStep(
       StepType type, Status status, const uint8* data, uint32 data_size);
 
   // Runs this test case and returns the test result through |completion_cb|.
   void Run(const CompletionCB& completion_cb);
 
  private:
@@ skipping 13 matching lines @@
     uint32 data_size;
   };
 
   // Returns whether |test_step| is a RESULT_* step.
   static bool IsResult(const TestStep& test_step);
 
   // Returns whether two results match.
   static bool MatchesResult(const TestStep& a, const TestStep& b);
 
   // cdm::FileIOClient implementation.
-  virtual void OnOpenComplete(Status status) override;
-  virtual void OnReadComplete(Status status,
-                              const uint8_t* data,
-                              uint32_t data_size) override;
-  virtual void OnWriteComplete(Status status) override;
+  void OnOpenComplete(Status status) override;
+  void OnReadComplete(Status status,
+                      const uint8_t* data,
+                      uint32_t data_size) override;
+  void OnWriteComplete(Status status) override;
 
   // Runs the next step in this test case.
   void RunNextStep();
 
   void OnResult(const TestStep& result);
 
   // Checks whether the test result matches this step. This can only be called
   // when this step is a RESULT_* step.
   bool CheckResult(const TestStep& result);
 
@@ skipping 34 matching lines @@
   std::vector<uint8> large_data_;
   size_t total_num_tests_;  // Total number of tests.
   size_t num_passed_tests_;  // Number of passed tests.
 
   DISALLOW_COPY_AND_ASSIGN (FileIOTestRunner);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_CDM_PPAPI_CDM_FILE_IO_TEST_H_