Remove calls to deprecated MessageLoop methods on Windows and Linux.

blimp/client/core/contents/blimp_contents_impl_unittest.cc

 // Copyright 2016 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.
 
 #include "blimp/client/core/contents/blimp_contents_impl.h"
 
 #include "base/message_loop/message_loop.h"
+#include "base/run_loop.h"
 #include "blimp/client/core/contents/blimp_contents_impl.h"
 #include "blimp/client/core/contents/fake_navigation_feature.h"
 #include "blimp/client/public/contents/blimp_contents_observer.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace blimp {
 namespace client {
 namespace {
 
@@ skipping 23 matching lines @@
 
   testing::StrictMock<MockBlimpContentsObserver> observer1;
   blimp_contents.AddObserver(&observer1);
   testing::StrictMock<MockBlimpContentsObserver> observer2;
   blimp_contents.AddObserver(&observer2);
 
   EXPECT_CALL(observer1, OnNavigationStateChanged());
   EXPECT_CALL(observer2, OnNavigationStateChanged()).Times(2);
 
   navigation_controller.LoadURL(GURL(kExampleURL));
-  loop.RunUntilIdle();
+  base::RunLoop().RunUntilIdle();
 
   EXPECT_EQ(kExampleURL, navigation_controller.GetURL().spec());
 
   // Observer should no longer receive callbacks.
   blimp_contents.RemoveObserver(&observer1);
 
   navigation_controller.LoadURL(GURL(kOtherExampleURL));
-  loop.RunUntilIdle();
+  base::RunLoop().RunUntilIdle();
 
   EXPECT_EQ(kOtherExampleURL, navigation_controller.GetURL().spec());
 }
 
 }  // namespace
 }  // namespace client
 }  // namespace blimp