Standardize usage of virtual/override/final specifiers.

gpu/command_buffer/common/debug_marker_manager_unittest.cc

Index: gpu/command_buffer/common/debug_marker_manager_unittest.cc
diff --git a/gpu/command_buffer/common/debug_marker_manager_unittest.cc b/gpu/command_buffer/common/debug_marker_manager_unittest.cc
index fa1cfccac321a57f43af18009230140445b92a2b..7852c774f020399cad5ab20bc42ecf51e35210c3 100644
--- a/gpu/command_buffer/common/debug_marker_manager_unittest.cc
+++ b/gpu/command_buffer/common/debug_marker_manager_unittest.cc
@@ -11,11 +11,9 @@ namespace gles2 {
 
 class DebugMarkerManagerTest : public testing::Test {
  protected:
-  virtual void SetUp() {
-  }
+  void SetUp() override {}
 
-  virtual void TearDown() {
-  }
+  void TearDown() override {}
 
   DebugMarkerManager manager_;
 };