ResizeObserver pt1: IDLs with stubs

third_party/WebKit/Source/core/core.gypi

 {
     'includes': [
         'core_generated.gypi',
     ],
     'variables': {
         # Files for which bindings (.cpp and .h files) will be generated
         'core_idl_files': [
             'animation/KeyframeEffect.idl',
             'animation/EffectModel.idl',
             'animation/AnimationEffectReadOnly.idl',
@@ skipping 241 matching lines @@
             'html/track/TextTrackCueList.idl',
             'html/track/TextTrackList.idl',
             'html/track/TrackEvent.idl',
             'html/track/VideoTrackList.idl',
             'html/track/vtt/VTTCue.idl',
             'html/track/vtt/VTTRegion.idl',
             'html/track/vtt/VTTRegionList.idl',
             'input/InputDeviceCapabilities.idl',
             'inspector/InspectorOverlayHost.idl',
             'loader/appcache/ApplicationCache.idl',
+            'observer/ResizeObserver.idl',
+            'observer/ResizeObserverCallback.idl',
+            'observer/ResizeObserverEntry.idl',
             'page/EventSource.idl',
             'page/PagePopupController.idl',
             'page/scrolling/ScrollState.idl',
             'page/scrolling/ScrollStateCallback.idl',
             'streams/ReadableByteStream.idl',
             'streams/ReadableByteStreamReader.idl',
             'streams/ReadableStreamReader.idl',
             'streams/Stream.idl',
             'streams/UnderlyingSourceBase.idl',
             'svg/SVGAElement.idl',
@@ skipping 2563 matching lines @@
             'input/KeyboardEventManager.cpp',
             'input/KeyboardEventManager.h',
             'input/PointerEventManager.cpp',
             'input/PointerEventManager.h',
             'input/ScrollManager.cpp',
             'input/ScrollManager.h',
             'input/TouchActionUtil.cpp',
             'input/TouchActionUtil.h',
             'input/TouchEventManager.cpp',
             'input/TouchEventManager.h',
+            'observer/ResizeObserver.h',
+            'observer/ResizeObserver.cpp',
+            'observer/ResizeObserverCallback.h',
+            'observer/ResizeObserverEntry.h',
+            'observer/ResizeObserverEntry.cpp',
         ],
         'webcore_html_files': [
             'html/AutoplayExperimentHelper.cpp',
             'html/AutoplayExperimentHelper.h',
             'html/ClassList.cpp',
             'html/ClassList.h',
             'html/CrossOriginAttribute.cpp',
             'html/CrossOriginAttribute.h',
             'html/DocumentNameCollection.cpp',
             'html/DocumentNameCollection.h',
@@ skipping 1349 matching lines @@
             'testing/PrivateScriptTestTest.cpp',
             'timing/MemoryInfoTest.cpp',
             'timing/PerformanceBaseTest.cpp',
             'timing/PerformanceObserverTest.cpp',
             'workers/WorkerThreadTest.cpp',
             'workers/WorkerThreadTestHelper.h',
             'xml/parser/SharedBufferReaderTest.cpp',
         ],
     }
 }