Mojo: Convert the remaining OVERRIDEs to override in mojo/.

mojo/services/gles2/command_buffer_impl.cc

Index: mojo/services/gles2/command_buffer_impl.cc
diff --git a/mojo/services/gles2/command_buffer_impl.cc b/mojo/services/gles2/command_buffer_impl.cc
index d821c2882571ed65da9f199624512bb3359f45cb..d221750e4c2103b52e20d17d45691309bb13f0ae 100644
--- a/mojo/services/gles2/command_buffer_impl.cc
+++ b/mojo/services/gles2/command_buffer_impl.cc
@@ -5,8 +5,8 @@
 #include "mojo/services/gles2/command_buffer_impl.h"
 
 #include "base/bind.h"
+#include "base/macros.h"
 #include "base/memory/shared_memory.h"
-
 #include "gpu/command_buffer/common/constants.h"
 #include "gpu/command_buffer/service/command_buffer_service.h"
 #include "gpu/command_buffer/service/context_group.h"
@@ -31,9 +31,9 @@ class MemoryTrackerStub : public gpu::gles2::MemoryTracker {
   virtual void TrackMemoryAllocatedChange(size_t old_size,
                                           size_t new_size,
                                           gpu::gles2::MemoryTracker::Pool pool)
-      OVERRIDE {}
+      override {}
 
-  virtual bool EnsureGPUMemoryAvailable(size_t size_needed) OVERRIDE {
+  virtual bool EnsureGPUMemoryAvailable(size_t size_needed) override {
     return true;
   };