[KeyEvent Mac] Remove the WebInputEventFactory from blink.

Source/web/web.gypi

 {
   'variables': {
     'web_files': [
       'AssertMatchingEnums.cpp',
       'AssociatedURLLoader.cpp',
       'AssociatedURLLoader.h',
       'ChromeClientImpl.cpp',
       'ChromeClientImpl.h',
       'ColorChooserPopupUIController.cpp',
       'ColorChooserPopupUIController.h',
@@ skipping 154 matching lines @@
       'WebHitTestResult.cpp',
       'WebIDBKey.cpp',
       'WebIDBKeyRange.cpp',
       'WebImageCache.cpp',
       'WebImageDecoder.cpp',
       'WebImageGenerator.cpp',
       'WebInputElement.cpp',
       'WebInputEvent.cpp',
       'WebInputEventConversion.cpp',
       'WebInputEventConversion.h',
-      'WebInputEventFactoryMac.mm',
       'WebKit.cpp',
       'WebLabelElement.cpp',
       'WebLeakDetector.cpp',
       'WebLocalFrameImpl.cpp',
       'WebLocalFrameImpl.h',
       'WebMIDIPermissionRequest.cpp',
       'WebMediaDevicesRequest.cpp',
       'WebMediaStreamRegistry.cpp',
       'WebNetworkStateNotifier.cpp',
       'WebNode.cpp',
@@ skipping 103 matching lines @@
       'tests/TextFinderTest.cpp',
       'tests/TopControlsTest.cpp',
       'tests/TouchActionTest.cpp',
       'tests/ViewportTest.cpp',
       'tests/VisualViewportTest.cpp',
       'tests/WebDocumentTest.cpp',
       'tests/WebFrameTest.cpp',
       'tests/WebHelperPluginTest.cpp',
       'tests/WebImageTest.cpp',
       'tests/WebInputEventConversionTest.cpp',
-      'tests/WebInputEventFactoryTestMac.mm',
       'tests/WebPageSerializerTest.cpp',
       'tests/WebPluginContainerTest.cpp',
       'tests/WebScopedWindowFocusAllowedIndicatorTest.cpp',
       'tests/WebSearchableFormDataTest.cpp',
       'tests/WebSelectorTest.cpp',
       'tests/WebURLRequestTest.cpp',
       'tests/WebURLResponseTest.cpp',
       'tests/WebUnitTests.cpp',
       'tests/WebUserGestureTokenTest.cpp',
       'tests/WebViewTest.cpp',
@@ skipping 24 matching lines @@
         {
           'web_unittest_files': [
             # Mac uses ScrollAnimatorMac instead of ScrollAnimatorNone.
             'tests/ScrollAnimatorNoneTest.cpp',
           ],
         }
       ],
     ],
   },
 }