Revert 112641 - aura: Use WebKit compositor by default

build/common.gypi

Index: build/common.gypi
===================================================================
--- build/common.gypi	(revision 112644)
+++ build/common.gypi	(working copy)
@@ -51,6 +51,9 @@
         'use_virtual_keyboard%': '<(use_virtual_keyboard)',
         'use_skia_on_mac%': '<(use_skia_on_mac)',
 
+        # WebKit compositor for ui
+        'use_webkit_compositor%': 0,
+
         # Compute the architecture that we're building on.
         'conditions': [
           [ 'OS=="win" or OS=="mac"', {
@@ -74,13 +77,6 @@
           ['use_aura==1', {
             'views_compositor%': 1,
           }],
-
-          # Use the WebKit compositor for ui, when Aura is on.
-          ['use_aura==1', {
-            'use_webkit_compositor%': 1,
-          }, {
-            'use_webkit_compositor%': 0,
-          }],
         ],
       },