Remove unnecessary Document.h includes in .cpp files

Source/modules/device_orientation/DeviceOrientationInspectorAgent.cpp

 // Copyright 2014 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 "config.h"
 #include "modules/device_orientation/DeviceOrientationInspectorAgent.h"
 
-#include "core/dom/Document.h"
 #include "core/frame/LocalFrame.h"
 #include "core/inspector/InspectorController.h"
 #include "core/inspector/InspectorState.h"
 #include "core/page/Page.h"
 
 #include "modules/device_orientation/DeviceOrientationController.h"
 #include "modules/device_orientation/DeviceOrientationData.h"
 
 namespace WebCore {
 
@@ skipping 58 matching lines @@
 }
 
 void DeviceOrientationInspectorAgent::didCommitLoadForMainFrame()
 {
     // New document in main frame - apply override there.
     // No need to cleanup previous one, as it's already gone.
     restore();
 }
 
 } // namespace WebCore