Fix mini_installer for Metro resources.

This ensures the enable_hidpi and enable_metro flags make it to the create_installer_archive script.

BUG=125547


Review URL: http://codereview.chromium.org/10262012

git-svn-id: http://src.chromium.org/svn/trunk/src/build@134935 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

common.gypi

@@ -44,7 +44,8 @@
           # Enable HiDPI support.
           'enable_hidpi%': 0,
 
-          # Enable Metro support.
+          # Enable inclusion of touch-optimized resources.
+          # TODO(joi): Rename to enable_touch_assets.
           'enable_metro%': 0,
         },
         # Copy conditionally-set variables out one scope.
@@ -266,7 +267,7 @@
 
       # Enable the task manager by default.
       'enable_task_manager%': 1,
-      
+
       # Enables support for promo resource service.
       'enable_promo_resource_service%': 1,