Mojo: Convert OVERRIDE -> override in mojo/{embedder,system}.

mojo/system/message_pipe_dispatcher_unittest.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // NOTE(vtl): Some of these tests are inherently flaky (e.g., if run on a
 // heavily-loaded system). Sorry. |test::EpsilonTimeout()| may be increased to
 // increase tolerance and reduce observed flakiness (though doing so reduces the
 // meaningfulness of the test).
 
 #include "mojo/system/message_pipe_dispatcher.h"
@@ skipping 513 matching lines @@
         write_dispatcher_(write_dispatcher),
         messages_written_(messages_written),
         bytes_written_(bytes_written) {
     *messages_written_ = 0;
     *bytes_written_ = 0;
   }
 
   virtual ~WriterThread() { Join(); }
 
  private:
-  virtual void Run() OVERRIDE {
+  virtual void Run() override {
     // Make some data to write.
     unsigned char buffer[kMaxMessageSize];
     for (size_t i = 0; i < kMaxMessageSize; i++)
       buffer[i] = static_cast<unsigned char>(i);
 
     // Number of messages to write.
     *messages_written_ = static_cast<size_t>(base::RandInt(1000, 6000));
 
     // Write messages.
     for (size_t i = 0; i < *messages_written_; i++) {
@@ skipping 32 matching lines @@
         read_dispatcher_(read_dispatcher),
         messages_read_(messages_read),
         bytes_read_(bytes_read) {
     *messages_read_ = 0;
     *bytes_read_ = 0;
   }
 
   virtual ~ReaderThread() { Join(); }
 
  private:
-  virtual void Run() OVERRIDE {
+  virtual void Run() override {
     unsigned char buffer[kMaxMessageSize];
     Waiter w;
     HandleSignalsState hss;
     MojoResult result;
 
     // Read messages.
     for (;;) {
       // Wait for it to be readable.
       w.Init();
       hss = HandleSignalsState();
@@ skipping 122 matching lines @@
   EXPECT_EQ(total_messages_written, total_messages_read);
   EXPECT_EQ(total_bytes_written, total_bytes_read);
 
   EXPECT_EQ(MOJO_RESULT_OK, d_write->Close());
   EXPECT_EQ(MOJO_RESULT_OK, d_read->Close());
 }
 
 }  // namespace
 }  // namespace system
 }  // namespace mojo