Add most missing blink files to .gn files

third_party/WebKit/Source/modules/device_orientation/BUILD.gn

 # 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.
 
 import("//third_party/WebKit/Source/modules/modules.gni")
 
 blink_modules_sources("device_orientation") {
   sources = [
+    "DOMWindowDeviceMotion.h",
+    "DOMWindowDeviceOrientation.h",
     "DeviceAcceleration.cpp",
     "DeviceAcceleration.h",
     "DeviceMotionController.cpp",
     "DeviceMotionController.h",
     "DeviceMotionData.cpp",
     "DeviceMotionData.h",
     "DeviceMotionDispatcher.cpp",
     "DeviceMotionDispatcher.h",
     "DeviceMotionEvent.cpp",
     "DeviceMotionEvent.h",
@@ skipping 10 matching lines @@
     "DeviceOrientationInspectorAgent.cpp",
     "DeviceOrientationInspectorAgent.h",
     "DeviceRotationRate.cpp",
     "DeviceRotationRate.h",
   ]
 
   deps = [
     "//device/sensors/public/cpp:shared_with_blink",
   ]
 }