Make sure the dependency on base is exported to components that depend on dbus.

BUG=none
TEST=none

Review URL: http://codereview.chromium.org/8414048

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@107900 0039d316-1c4b-4281-b951-d872f2087c98

dbus/dbus.gyp

@@ -14,6 +14,9 @@
         '../base/base.gyp:base',
         '../build/linux/system.gyp:dbus',
       ],
+      'export_dependent_settings': [
+        '../base/base.gyp:base',
+      ],
       'sources': [
         'bus.cc',
         'bus.h',