Remove WebGraphicsContext/WebGraphicsContextImpl

third_party/WebKit/Source/web/web.gypi

 {
   'variables': {
     'web_files': [
       'AssertMatchingEnums.cpp',
       'AssociatedURLLoader.cpp',
       'AssociatedURLLoader.h',
       'ChromeClientImpl.cpp',
       'ChromeClientImpl.h',
       'ColorChooserPopupUIController.cpp',
       'ColorChooserPopupUIController.h',
@@ skipping 138 matching lines @@
       'WebFormElement.cpp',
       'WebFrame.cpp',
       'WebFrameWidgetImpl.cpp',
       'WebFrameWidgetImpl.h',
       'WebGeolocationController.cpp',
       'WebGeolocationError.cpp',
       'WebGeolocationPermissionRequest.cpp',
       'WebGeolocationPermissionRequestManager.cpp',
       'WebGeolocationPosition.cpp',
       'WebGlyphCache.cpp',
-      'WebGraphicsContextImpl.cpp',
-      'WebGraphicsContextImpl.h',
       'WebHeap.cpp',
       'WebHelperPluginImpl.cpp',
       'WebHelperPluginImpl.h',
       'WebHistoryItem.cpp',
       'WebHitTestResult.cpp',
       'WebIDBKey.cpp',
       'WebIDBKeyRange.cpp',
       'WebImageCache.cpp',
       'WebImageDecoder.cpp',
       'WebInputElement.cpp',
@@ skipping 153 matching lines @@
         {
           'web_unittest_files': [
             # Mac uses ScrollAnimatorMac instead of ScrollAnimatorNone.
             'tests/ScrollAnimatorNoneTest.cpp',
           ],
         }
       ],
     ],
   },
 }