Standardize usage of virtual/override/final in content/

content/shell/app/shell_crash_reporter_client.h

Index: content/shell/app/shell_crash_reporter_client.h
diff --git a/content/shell/app/shell_crash_reporter_client.h b/content/shell/app/shell_crash_reporter_client.h
index c68f63f2915056a75bc35adaf59301cf3c272205..fe53e7ddf1b5cbf08f16dec6aaf12b40ba2e9cca 100644
--- a/content/shell/app/shell_crash_reporter_client.h
+++ b/content/shell/app/shell_crash_reporter_client.h
@@ -13,7 +13,7 @@ namespace content {
 class ShellCrashReporterClient : public crash_reporter::CrashReporterClient {
  public:
   ShellCrashReporterClient();
-  virtual ~ShellCrashReporterClient();
+  ~ShellCrashReporterClient() override;
 
 #if defined(OS_WIN)
   // Returns a textual description of the product type and version to include
@@ -36,15 +36,14 @@ class ShellCrashReporterClient : public crash_reporter::CrashReporterClient {
 
   // The location where minidump files should be written. Returns true if
   // |crash_dir| was set.
-  virtual bool GetCrashDumpLocation(base::FilePath* crash_dir) override;
+  bool GetCrashDumpLocation(base::FilePath* crash_dir) override;
 
 #if defined(OS_ANDROID)
   // Returns the descriptor key of the android minidump global descriptor.
   virtual int GetAndroidMinidumpDescriptor() override;
 #endif
 
-  virtual bool EnableBreakpadForProcess(
-      const std::string& process_type) override;
+  bool EnableBreakpadForProcess(const std::string& process_type) override;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(ShellCrashReporterClient);