Reland 102005 and 102009: aura: Explicitly disable GTK.

build/common.gypi

Index: build/common.gypi
diff --git a/build/common.gypi b/build/common.gypi
index d2666c4ccff3b0c84f2810aaa53ab9e9c7baf408..33763c125a2beb5f886c604785e06f136c8d8e93 100644
--- a/build/common.gypi
+++ b/build/common.gypi
@@ -235,18 +235,21 @@
           'os_posix%': 1,
         }],
 
-        # Flag to use X11 on non-Mac POSIX platforms
+        # Flags to use X11 on non-Mac POSIX platforms
         ['OS=="win" or OS=="mac" or OS=="android"', {
+          'use_glib%': 0,
+          'toolkit_uses_gtk%': 0,
           'use_x11%': 0,
         }, {
+          # TODO(dnicoara) Wayland build should have these disabled, but
+          # currently GTK and X is too spread and it's hard to completely
+          # remove every dependency.
+          'use_glib%': 1,
+          'toolkit_uses_gtk%': 1,
           'use_x11%': 1,
         }],
-
-        # Flag to use Gtk on non-Aura and non-Mac POSIX platforms
-        ['OS=="win" or OS=="mac" or OS=="android" or use_aura==1', {
+        ['use_aura==1 and OS!="win"', {
           'toolkit_uses_gtk%': 0,
-        }, {
-          'toolkit_uses_gtk%': 1,
         }],
 
         # A flag to enable or disable our compile-time dependency
@@ -310,6 +313,7 @@
     'views_compositor%': '<(views_compositor)',
     'use_aura%': '<(use_aura)',
     'os_posix%': '<(os_posix)',
+    'use_glib%': '<(use_glib)',
     'toolkit_uses_gtk%': '<(toolkit_uses_gtk)',
     'use_skia%': '<(use_skia)',
     'use_x11%': '<(use_x11)',