Delete dead Device Motion code in Blink.

Source/core/loader/EmptyClients.h

 /*
  * Copyright (C) 2006 Eric Seidel (eric@webkit.org)
  * Copyright (C) 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
  * Copyright (C) 2012 Samsung Electronics. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
@@ skipping 25 matching lines @@
 #include "core/page/ChromeClient.h"
 #include "core/page/ContextMenuClient.h"
 #include "core/page/DragClient.h"
 #include "core/page/EditorClient.h"
 #include "core/page/FocusDirection.h"
 #include "core/page/Page.h"
 #include "core/platform/DragImage.h"
 #include "core/platform/graphics/FloatRect.h"
 #include "core/platform/network/ResourceError.h"
 #include "core/platform/text/TextCheckerClient.h"
-#include "modules/device_orientation/DeviceMotionClient.h"
 #include "public/platform/WebScreenInfo.h"
 #include "wtf/Forward.h"
 
 #include <v8.h>
 
 /*
  This file holds empty Client stubs for use by WebCore.
  Viewless element needs to create a dummy Page->Frame->FrameView tree for use in parsing or executing JavaScript.
  This tree depends heavily on Clients (usually provided by WebKit classes).
 
@@ skipping 309 matching lines @@
     virtual void highlight() OVERRIDE { }
     virtual void hideHighlight() OVERRIDE { }
 };
 
 class EmptyDeviceClient : public DeviceClient {
 public:
     virtual void startUpdating() OVERRIDE { }
     virtual void stopUpdating() OVERRIDE { }
 };
 
-class EmptyDeviceMotionClient : public DeviceMotionClient {
-public:
-    virtual void setController(DeviceMotionController*) OVERRIDE { }
-    virtual DeviceMotionData* lastMotion() const OVERRIDE { return 0; }
-    virtual void deviceMotionControllerDestroyed() OVERRIDE { }
-};
-
 class EmptyDeviceOrientationClient : public DeviceOrientationClient {
 public:
     virtual void setController(DeviceOrientationController*) OVERRIDE { }
     virtual DeviceOrientationData* lastOrientation() const OVERRIDE { return 0; }
     virtual void deviceOrientationControllerDestroyed() OVERRIDE { }
 };
 
 class EmptyBackForwardClient : public BackForwardClient {
 public:
     virtual void addItem(PassRefPtr<HistoryItem>) OVERRIDE { }
     virtual void goToItem(HistoryItem*) OVERRIDE { }
     virtual HistoryItem* itemAtIndex(int) OVERRIDE { return 0; }
     virtual int backListCount() OVERRIDE { return 0; }
     virtual int forwardListCount() OVERRIDE { return 0; }
     virtual bool isActive() OVERRIDE { return false; }
     virtual void close() OVERRIDE { }
 };
 
 void fillWithEmptyClients(Page::PageClients&);
 
 }
 
 #endif // EmptyClients_h