Use chrome_html structure for shared_resources and options2 page.

This will automatically pull in high DPI theme resources and locally available high DPI webui resources.

BUG=130124
TEST=Theme resources are referenced using @2x when running with scale factor 2.


Review URL: https://chromiumcodereview.appspot.com/10444060

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@140355 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/build/common.gypi b/build/common.gypi
index bc9cee2f..b2a7693 100644
--- a/build/common.gypi
+++ b/build/common.gypi
@@ -1037,7 +1037,7 @@
                          '-E', 'CHROMIUM_BUILD=chromium'],
       }],
       ['chromeos==1', {
-        'grit_defines': ['-D', 'chromeos'],
+        'grit_defines': ['-D', 'chromeos', '-D', 'scale_factors=2x'],
       }],
       ['toolkit_views==1', {
         'grit_defines': ['-D', 'toolkit_views'],