base: Add missing "virtual" keyword and OVERRIDE to some methods.

base/message_pump_glib_unittest.cc

Index: base/message_pump_glib_unittest.cc
diff --git a/base/message_pump_glib_unittest.cc b/base/message_pump_glib_unittest.cc
index feefe7647060f7c93d3c92ca6fcc83600fcf0dc0..e23cc1ed205fa30a2afd44440f2fa8c17593a8be 100644
--- a/base/message_pump_glib_unittest.cc
+++ b/base/message_pump_glib_unittest.cc
@@ -162,12 +162,12 @@ class MessagePumpGLibTest : public testing::Test {
  public:
   MessagePumpGLibTest() : loop_(NULL), injector_(NULL) { }
 
-  virtual void SetUp() {
+  // Overridden from testing::Test:
+  virtual void SetUp() OVERRIDE {
     loop_ = new MessageLoop(MessageLoop::TYPE_UI);
     injector_ = new EventInjector();
   }
-
-  virtual void TearDown() {
+  virtual void TearDown() OVERRIDE {
     delete injector_;
     injector_ = NULL;
     delete loop_;