Mojo: MOJO_OVERRIDE -> override in mojo/.

mojo/public/cpp/environment/lib/default_async_waiter.cc

Index: mojo/public/cpp/environment/lib/default_async_waiter.cc
diff --git a/mojo/public/cpp/environment/lib/default_async_waiter.cc b/mojo/public/cpp/environment/lib/default_async_waiter.cc
index 257f1c8d797c02c37e0341c158c0576fa11c7e28..b03623eaf5783857b88604b1ec49e3400326a9c4 100644
--- a/mojo/public/cpp/environment/lib/default_async_waiter.cc
+++ b/mojo/public/cpp/environment/lib/default_async_waiter.cc
@@ -33,12 +33,11 @@ class RunLoopHandlerImpl : public RunLoopHandler {
   }
 
   // RunLoopHandler:
-  virtual void OnHandleReady(const Handle& handle) MOJO_OVERRIDE {
+  virtual void OnHandleReady(const Handle& handle) override {
     NotifyCallback(MOJO_RESULT_OK);
   }
 
-  virtual void OnHandleError(const Handle& handle,
-                             MojoResult result) MOJO_OVERRIDE {
+  virtual void OnHandleError(const Handle& handle, MojoResult result) override {
     NotifyCallback(result);
   }