Revert r93294, doesn't compile on Chromium Mac.

* features.gypi:

git-svn-id: svn://svn.chromium.org/blink/trunk@93313 bbb929c8-8fbe-4397-9dbb-9b2b20218538

third_party/WebKit/Source/WebKit/chromium/ChangeLog

+2011-08-18  Tony Chang  <tony@chromium.org>
+
+        Revert r93294, doesn't compile on Chromium Mac.
+
+        * features.gypi:
+
 2011-08-17  Adam Roben  <aroben@apple.com>
 
         Make WebCore keep track of the current device scale factor

third_party/WebKit/Source/WebKit/chromium/features.gypi

@@ -154,8 +154,6 @@
       ['OS=="mac"', {
         'feature_defines': [
           'ENABLE_RUBBER_BANDING=1',
-          # Unconditionally enable smooth scrolling on mac.
-          'ENABLE_SMOOTH_SCROLLING=1',
           'WTF_USE_SKIA_ON_MAC_CHROMIUM=<(use_skia)',
         ],
       }],