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

content/shell/app/shell_crash_reporter_client.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 CONTENT_SHELL_APP_SHELL_CRASH_REPORTER_CLIENT_H_
 #define CONTENT_SHELL_APP_SHELL_CRASH_REPORTER_CLIENT_H_
 
 #include "base/compiler_specific.h"
 #include "components/crash/app/crash_reporter_client.h"
 
 namespace content {
 
 class ShellCrashReporterClient : public crash_reporter::CrashReporterClient {
  public:
   ShellCrashReporterClient();
   ~ShellCrashReporterClient() override;
 
 #if defined(OS_WIN)
   // Returns a textual description of the product type and version to include
   // in the crash report.
-  virtual void GetProductNameAndVersion(const base::FilePath& exe_path,
-                                        base::string16* product_name,
-                                        base::string16* version,
-                                        base::string16* special_build,
-                                        base::string16* channel_name) override;
+  void GetProductNameAndVersion(const base::FilePath& exe_path,
+                                base::string16* product_name,
+                                base::string16* version,
+                                base::string16* special_build,
+                                base::string16* channel_name) override;
 #endif
 
 #if defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_IOS)
   // Returns a textual description of the product type and version to include
   // in the crash report.
   void GetProductNameAndVersion(const char** product_name,
                                 const char** version) override;
 
   base::FilePath GetReporterLogFilename() override;
 #endif
 
   // The location where minidump files should be written. Returns true if
   // |crash_dir| was set.
   bool GetCrashDumpLocation(base::FilePath* crash_dir) override;
 
 #if defined(OS_ANDROID)
   // Returns the descriptor key of the android minidump global descriptor.
   int GetAndroidMinidumpDescriptor() override;
 #endif
 
   bool EnableBreakpadForProcess(const std::string& process_type) override;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(ShellCrashReporterClient);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_SHELL_APP_SHELL_CRASH_REPORTER_CLIENT_H_