Change default on Mac to use_skia=1

For context, see http://groups.google.com/a/chromium.org/group/chromium-dev/browse_thread/thread/f8d4f43b6e66ab83#
Review URL: http://codereview.chromium.org/8002009

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@102532 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/build/common.gypi b/build/common.gypi
index 55654d1f..2d0beb7 100644
--- a/build/common.gypi
+++ b/build/common.gypi
@@ -208,8 +208,11 @@
       'enable_webrtc%': 1,
 
       'conditions': [
+        # TODO(epoger): Figure out how to set use_skia=1 for Mac outside of
+        # the 'conditions' clause.  Initial attempts resulted in chromium and
+        # webkit disagreeing on its setting.
         ['OS=="mac"', {
-          'use_skia%': 0,
+          'use_skia%': 1,
           # Mac uses clang by default, so turn on the plugin as well.
           'clang_use_chrome_plugins%': 1,
         }, {