Mojo: Convert OVERRIDE -> override in various subdirectories of mojo/.

mojo/cc/output_surface_mojo.h

Index: mojo/cc/output_surface_mojo.h
diff --git a/mojo/cc/output_surface_mojo.h b/mojo/cc/output_surface_mojo.h
index 32b85be66f4effe1f798250b5c5a204e46fd819c..b8f2bab4a845316e766447137c6990fb3a837089 100644
--- a/mojo/cc/output_surface_mojo.h
+++ b/mojo/cc/output_surface_mojo.h
@@ -5,6 +5,7 @@
 #ifndef MOJO_CC_OUTPUT_SURFACE_MOJO_H_
 #define MOJO_CC_OUTPUT_SURFACE_MOJO_H_
 
+#include "base/macros.h"
 #include "cc/output/output_surface.h"
 #include "cc/surfaces/surface_id.h"
 #include "cc/surfaces/surface_id_allocator.h"
@@ -27,11 +28,11 @@ class OutputSurfaceMojo : public cc::OutputSurface, public SurfaceClient {
                     uint32_t id_namespace);
 
   // SurfaceClient implementation.
-  virtual void ReturnResources(Array<ReturnedResourcePtr> resources) OVERRIDE;
+  virtual void ReturnResources(Array<ReturnedResourcePtr> resources) override;
 
   // cc::OutputSurface implementation.
-  virtual void SwapBuffers(cc::CompositorFrame* frame) OVERRIDE;
-  virtual bool BindToClient(cc::OutputSurfaceClient* client) OVERRIDE;
+  virtual void SwapBuffers(cc::CompositorFrame* frame) override;
+  virtual bool BindToClient(cc::OutputSurfaceClient* client) override;
 
  protected:
   virtual ~OutputSurfaceMojo();