Revert "Remove web/{android, gtk, win}"

Source/web/web.gypi

Index: Source/web/web.gypi
diff --git a/Source/web/web.gypi b/Source/web/web.gypi
index 541e4aa99149e397265a7cb6576db97b4786a3eb..58dad6563446bc48ab1dbd1e894cc78604d65e81 100644
--- a/Source/web/web.gypi
+++ b/Source/web/web.gypi
@@ -178,10 +178,6 @@
       'WebImageSkia.cpp',
       'WebInputElement.cpp',
       'WebInputEvent.cpp',
-      'WebInputEventFactoryAndroid.cpp',
-      'WebInputEventFactoryGtk.cpp',
-      'WebInputEventFactoryWin.cpp',
-      'WebInputEventFactory.mm',
       'WebInputEventConversion.cpp',
       'WebInputEventConversion.h',
       'WebKit.cpp',
@@ -264,15 +260,19 @@
       'WorkerAllowMainThreadBridgeBase.h',
       'WorkerFileSystemClient.cpp',
       'WorkerFileSystemClient.h',
+      'android/WebInputEventFactory.cpp',
       'default/WebRenderTheme.cpp',
+      'gtk/WebInputEventFactory.cpp',
       'linux/WebFontInfo.cpp',
       'linux/WebFontRenderStyle.cpp',
       'linux/WebFontRendering.cpp',
+      'mac/WebInputEventFactory.mm',
       'mac/WebSubstringUtil.mm',
       'painting/ContinuousPainter.cpp',
       'painting/ContinuousPainter.h',
       'painting/PaintAggregator.cpp',
       'painting/PaintAggregator.h',
+      'win/WebInputEventFactory.cpp',
     ],
     'web_unittest_files': [
       'tests/AssociatedURLLoaderTest.cpp',