Standardize usage of virtual/override/final in content/

content/ppapi_plugin/ppapi_thread.h

Index: content/ppapi_plugin/ppapi_thread.h
diff --git a/content/ppapi_plugin/ppapi_thread.h b/content/ppapi_plugin/ppapi_thread.h
index 58fceeb6f5d5866594cfe28adb1733badb4d3763..3d80e490c9fb348ca0b43acefe2e0ca3b32444a8 100644
--- a/content/ppapi_plugin/ppapi_thread.h
+++ b/content/ppapi_plugin/ppapi_thread.h
@@ -45,8 +45,8 @@ class PpapiThread : public ChildThread,
                     public ppapi::proxy::PluginProxyDelegate {
  public:
   PpapiThread(const base::CommandLine& command_line, bool is_broker);
-  virtual ~PpapiThread();
-  virtual void Shutdown() override;
+  ~PpapiThread() override;
+  void Shutdown() override;
 
  private:
   // Make sure the enum list in tools/histogram/histograms.xml is updated with
@@ -62,34 +62,32 @@ class PpapiThread : public ChildThread,
   };
 
   // ChildThread overrides.
-  virtual bool Send(IPC::Message* msg) override;
-  virtual bool OnControlMessageReceived(const IPC::Message& msg) override;
-  virtual void OnChannelConnected(int32 peer_pid) override;
+  bool Send(IPC::Message* msg) override;
+  bool OnControlMessageReceived(const IPC::Message& msg) override;
+  void OnChannelConnected(int32 peer_pid) override;
 
   // PluginDispatcher::PluginDelegate implementation.
-  virtual std::set<PP_Instance>* GetGloballySeenInstanceIDSet() override;
-  virtual base::MessageLoopProxy* GetIPCMessageLoop() override;
-  virtual base::WaitableEvent* GetShutdownEvent() override;
-  virtual IPC::PlatformFileForTransit ShareHandleWithRemote(
+  std::set<PP_Instance>* GetGloballySeenInstanceIDSet() override;
+  base::MessageLoopProxy* GetIPCMessageLoop() override;
+  base::WaitableEvent* GetShutdownEvent() override;
+  IPC::PlatformFileForTransit ShareHandleWithRemote(
       base::PlatformFile handle,
       base::ProcessId peer_pid,
       bool should_close_source) override;
-  virtual uint32 Register(
-      ppapi::proxy::PluginDispatcher* plugin_dispatcher) override;
-  virtual void Unregister(uint32 plugin_dispatcher_id) override;
+  uint32 Register(ppapi::proxy::PluginDispatcher* plugin_dispatcher) override;
+  void Unregister(uint32 plugin_dispatcher_id) override;
 
   // PluginProxyDelegate.
   // SendToBrowser() is intended to be safe to use on another thread so
   // long as the main PpapiThread outlives it.
-  virtual IPC::Sender* GetBrowserSender() override;
-  virtual std::string GetUILanguage() override;
-  virtual void PreCacheFont(const void* logfontw) override;
-  virtual void SetActiveURL(const std::string& url) override;
-  virtual PP_Resource CreateBrowserFont(
-      ppapi::proxy::Connection connection,
-      PP_Instance instance,
-      const PP_BrowserFont_Trusted_Description& desc,
-      const ppapi::Preferences& prefs) override;
+  IPC::Sender* GetBrowserSender() override;
+  std::string GetUILanguage() override;
+  void PreCacheFont(const void* logfontw) override;
+  void SetActiveURL(const std::string& url) override;
+  PP_Resource CreateBrowserFont(ppapi::proxy::Connection connection,
+                                PP_Instance instance,
+                                const PP_BrowserFont_Trusted_Description& desc,
+                                const ppapi::Preferences& prefs) override;
 
   // Message handlers.
   void OnLoadPlugin(const base::FilePath& path,