Adding WebVR interface to Blink

Source/modules/modules.gypi

 {
   'includes': [
     '../core/core_generated.gypi',
     'modules_generated.gypi',
   ],
   'variables': {
     # Experimental hooks for embedder to provide extra IDL and source files.
     #
     # Note: this is not a supported API. If you rely on this, you will be broken
     # from time to time as the code generator changes in backward incompatible
@@ skipping 147 matching lines @@
       'speech/SpeechRecognition.idl',
       'speech/SpeechRecognitionAlternative.idl',
       'speech/SpeechRecognitionError.idl',
       'speech/SpeechRecognitionEvent.idl',
       'speech/SpeechRecognitionResult.idl',
       'speech/SpeechRecognitionResultList.idl',
       'speech/SpeechSynthesis.idl',
       'speech/SpeechSynthesisEvent.idl',
       'speech/SpeechSynthesisUtterance.idl',
       'speech/SpeechSynthesisVoice.idl',
+      'vr/HMDVRDevice.idl',
+      'vr/PositionSensorVRDevice.idl',
+      'vr/VRDevice.idl',
+      'vr/VRFieldOfView.idl',
+      'vr/VRPositionState.idl',
       'webaudio/AnalyserNode.idl',
       'webaudio/AudioBuffer.idl',
       'webaudio/AudioBufferCallback.idl',
       'webaudio/AudioBufferSourceNode.idl',
       'webaudio/AudioContext.idl',
       'webaudio/AudioDestinationNode.idl',
       'webaudio/AudioListener.idl',
       'webaudio/AudioNode.idl',
       'webaudio/AudioParam.idl',
       'webaudio/AudioProcessingEvent.idl',
@@ skipping 85 matching lines @@
       'push_messaging/ServiceWorkerGlobalScopePush.idl',
       'push_messaging/ServiceWorkerRegistrationPush.idl',
       'quota/NavigatorStorageQuota.idl',
       'quota/WindowQuota.idl',
       'quota/WorkerNavigatorStorageQuota.idl',
       'screen_orientation/ScreenScreenOrientation.idl',
       'serviceworkers/NavigatorServiceWorker.idl',
       'speech/WindowSpeech.idl',
       'speech/WindowSpeechSynthesis.idl',
       'vibration/NavigatorVibration.idl',
+      'vr/NavigatorVRDevice.idl',
       'webaudio/WindowWebAudio.idl',
       'webdatabase/WindowWebDatabase.idl',
       'webmidi/NavigatorWebMIDI.idl',
     ],
     # interfaces that inherit from Event
     'modules_event_idl_files': [
       'device_light/DeviceLightEvent.idl',
       'device_orientation/DeviceMotionEvent.idl',
       'device_orientation/DeviceOrientationEvent.idl',
       'encryptedmedia/MediaEncryptedEvent.idl',
@@ skipping 713 matching lines @@
       'speech/SpeechSynthesis.cpp',
       'speech/SpeechSynthesis.h',
       'speech/SpeechSynthesisEvent.cpp',
       'speech/SpeechSynthesisEvent.h',
       'speech/SpeechSynthesisUtterance.cpp',
       'speech/SpeechSynthesisUtterance.h',
       'speech/SpeechSynthesisVoice.cpp',
       'speech/SpeechSynthesisVoice.h',
       'vibration/NavigatorVibration.cpp',
       'vibration/NavigatorVibration.h',
+      'vr/HMDVRDevice.cpp',
+      'vr/HMDVRDevice.h',
+      'vr/NavigatorVRDevice.cpp',
+      'vr/NavigatorVRDevice.h',
+      'vr/PositionSensorVRDevice.cpp',
+      'vr/PositionSensorVRDevice.h',
+      'vr/VRDevice.cpp',
+      'vr/VRDevice.h',
+      'vr/VRFieldOfView.h',
+      'vr/VRHardwareUnit.cpp',
+      'vr/VRHardwareUnit.h',
+      'vr/VRPositionState.cpp',
+      'vr/VRPositionState.h',
       'webaudio/AnalyserNode.cpp',
       'webaudio/AnalyserNode.h',
       'webaudio/AsyncAudioDecoder.cpp',
       'webaudio/AsyncAudioDecoder.h',
       'webaudio/AudioBasicInspectorNode.cpp',
       'webaudio/AudioBasicInspectorNode.h',
       'webaudio/AudioBasicProcessorNode.cpp',
       'webaudio/AudioBasicProcessorNode.h',
       'webaudio/AudioBuffer.cpp',
       'webaudio/AudioBuffer.h',
@@ skipping 218 matching lines @@
       'indexeddb/IDBKeyPathTest.cpp',
       'indexeddb/IDBRequestTest.cpp',
       'indexeddb/IDBTransactionTest.cpp',
       'serviceworkers/CacheTest.cpp',
       'serviceworkers/ServiceWorkerContainerTest.cpp',
       'websockets/DOMWebSocketTest.cpp',
       'websockets/DocumentWebSocketChannelTest.cpp',
     ],
   },
 }