GYP fix: toolkit_uses_gtk% should be dependent on use_aura%.

build/common.gypi

Index: build/common.gypi
diff --git a/build/common.gypi b/build/common.gypi
index 61b707045348f517aabcd5d3865848a055d61216..ff971afc7110476c7f4be05e8b7439a1776c5d58 100644
--- a/build/common.gypi
+++ b/build/common.gypi
@@ -325,10 +325,10 @@
         }],
 
         # Set toolkit_uses_gtk for the Chromium browser on Linux.
-        ['OS=="linux" and chromeos==0', {
-          'toolkit_uses_gtk%': 1,
-        }, {
+        ['OS=="linux" and use_aura==1', {

[Emmanuel Saint-loubert-Bié, 2012/03/20 22:25:15]

If you want to go this way the test could simply be use_aura==1 (remove linux).
Since toolkit_uses_gtk and use_aura are at this time mutually exclusive.

           'toolkit_uses_gtk%': 0,
+        }, {
+          'toolkit_uses_gtk%': 1,

[Emmanuel Saint-loubert-Bié, 2012/03/20 22:25:15]

I am wondering if we should have this set to 1 for platforms that clearly do not
need it (e.g Win. Mac...)

         }],
 
         # We always use skia text rendering in Aura on Windows, since GDI