Use a direct include of the message_loop header in content/, part 4.

content/renderer/device_orientation/device_motion_event_pump_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.
 
 #include "device_motion_event_pump.h"
 
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
-#include "base/message_loop.h"
+#include "base/message_loop/message_loop.h"
 #include "content/common/device_motion_hardware_buffer.h"
 #include "content/public/test/test_utils.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "third_party/WebKit/public/platform/WebDeviceMotionListener.h"
 
 namespace content {
 
 class DeviceMotionEventPumpTest : public testing::Test {
 };
 
@@ skipping 154 matching lines @@
   EXPECT_FALSE(received_data.hasAccelerationZ);
   EXPECT_FALSE(received_data.hasAccelerationIncludingGravityX);
   EXPECT_FALSE(received_data.hasAccelerationIncludingGravityY);
   EXPECT_FALSE(received_data.hasAccelerationIncludingGravityZ);
   EXPECT_FALSE(received_data.hasRotationRateAlpha);
   EXPECT_FALSE(received_data.hasRotationRateBeta);
   EXPECT_FALSE(received_data.hasRotationRateGamma);
 }
 
 }  // namespace content