Standardize usage of virtual/override/final in chrome/

chrome/utility/importer/firefox_importer_unittest_utils_mac.cc

Index: chrome/utility/importer/firefox_importer_unittest_utils_mac.cc
diff --git a/chrome/utility/importer/firefox_importer_unittest_utils_mac.cc b/chrome/utility/importer/firefox_importer_unittest_utils_mac.cc
index 782acaceb12329418e53f99efb94cd552f43d445..2ae60eaaadb35b53910baace90dea717c8e8eca3 100644
--- a/chrome/utility/importer/firefox_importer_unittest_utils_mac.cc
+++ b/chrome/utility/importer/firefox_importer_unittest_utils_mac.cc
@@ -103,7 +103,7 @@ class FFDecryptorServerChannelListener : public IPC::Listener {
       sender_->Send(new Msg_Decryptor_Quit());
   }
 
-  virtual bool OnMessageReceived(const IPC::Message& msg) override {
+  bool OnMessageReceived(const IPC::Message& msg) override {
     bool handled = true;
     IPC_BEGIN_MESSAGE_MAP(FFDecryptorServerChannelListener, msg)
       IPC_MESSAGE_HANDLER(Msg_Decryptor_InitReturnCode, OnInitDecryptorResponse)
@@ -115,7 +115,7 @@ class FFDecryptorServerChannelListener : public IPC::Listener {
   }
 
   // If an error occured, just kill the message Loop.
-  virtual void OnChannelError() override {
+  void OnChannelError() override {
     got_result = false;
     base::MessageLoop::current()->Quit();
   }
@@ -264,7 +264,7 @@ class FFDecryptorClientChannelListener : public IPC::Listener {
     base::MessageLoop::current()->Quit();
   }
 
-  virtual bool OnMessageReceived(const IPC::Message& msg) override {
+  bool OnMessageReceived(const IPC::Message& msg) override {
     bool handled = true;
     IPC_BEGIN_MESSAGE_MAP(FFDecryptorClientChannelListener, msg)
       IPC_MESSAGE_HANDLER(Msg_Decryptor_Init, OnDecryptor_Init)
@@ -276,9 +276,7 @@ class FFDecryptorClientChannelListener : public IPC::Listener {
     return handled;
   }
 
-  virtual void OnChannelError() override {
-    base::MessageLoop::current()->Quit();
-  }
+  void OnChannelError() override { base::MessageLoop::current()->Quit(); }
 
  private:
   NSSDecryptor decryptor_;