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

mojo/examples/wm_flow/embedded/embedded.cc

Index: mojo/examples/wm_flow/embedded/embedded.cc
diff --git a/mojo/examples/wm_flow/embedded/embedded.cc b/mojo/examples/wm_flow/embedded/embedded.cc
index 0433d83bd2c2eac853d9801e66628afb0379ecd2..f69aa9083211a58eea94820f200f95a361a764d4 100644
--- a/mojo/examples/wm_flow/embedded/embedded.cc
+++ b/mojo/examples/wm_flow/embedded/embedded.cc
@@ -3,6 +3,7 @@
 // found in the LICENSE file.
 
 #include "base/bind.h"
+#include "base/macros.h"
 #include "mojo/application/application_runner_chromium.h"
 #include "mojo/examples/wm_flow/app/embedder.mojom.h"
 #include "mojo/examples/wm_flow/embedded/embeddee.mojom.h"
@@ -28,7 +29,7 @@ class EmbeddeeImpl : public mojo::InterfaceImpl<Embeddee> {
 
  private:
   // Overridden from Embeddee:
-  virtual void HelloBack(const mojo::Callback<void()>& callback) OVERRIDE {
+  virtual void HelloBack(const mojo::Callback<void()>& callback) override {
     callback.Run();
   }