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

ppapi/host/resource_message_filter_unittest.cc

Index: ppapi/host/resource_message_filter_unittest.cc
diff --git a/ppapi/host/resource_message_filter_unittest.cc b/ppapi/host/resource_message_filter_unittest.cc
index fbd8de48f95552c9a9025ca12d35fe1cbb76fda8..59bbc59eeb17bed5119a473d57a2912d09f6dd6e 100644
--- a/ppapi/host/resource_message_filter_unittest.cc
+++ b/ppapi/host/resource_message_filter_unittest.cc
@@ -59,9 +59,8 @@ class MyResourceHost : public ResourceHost {
     AddFilter(filter);
   }
 
-  virtual int32_t OnResourceMessageReceived(
-      const IPC::Message& msg,
-      HostMessageContext* context) override {
+  int32_t OnResourceMessageReceived(const IPC::Message& msg,
+                                    HostMessageContext* context) override {
     last_handled_msg_ = msg;
     if (msg.type() == msg_type_) {
       context->reply_msg = IPC::Message(0, reply_msg_type_,
@@ -71,8 +70,8 @@ class MyResourceHost : public ResourceHost {
     return PP_ERROR_FAILED;
   }
 
-  virtual void SendReply(const ReplyMessageContext& context,
-                         const IPC::Message& msg) override {
+  void SendReply(const ReplyMessageContext& context,
+                 const IPC::Message& msg) override {
     last_reply_msg_ = msg;
     last_reply_message_loop_ = base::MessageLoop::current();
     g_handler_completion.Signal();
@@ -110,14 +109,14 @@ class MyResourceFilter : public ResourceMessageFilter {
   const IPC::Message& last_handled_msg() const { return last_handled_msg_; }
   base::MessageLoop* last_message_loop() const { return last_message_loop_; }
 
-  virtual scoped_refptr<base::TaskRunner> OverrideTaskRunnerForMessage(
+  scoped_refptr<base::TaskRunner> OverrideTaskRunnerForMessage(
       const IPC::Message& msg) override {
     if (msg.type() == msg_type_)
       return message_loop_proxy_;
     return NULL;
   }
 
-  virtual int32_t OnResourceMessageReceived(
+  int32_t OnResourceMessageReceived(
       const IPC::Message& msg,
       HostMessageContext* context) override {
     last_handled_msg_ = msg;