Metro/HiDPI: Use metro resource pak in metro mode

chrome/chrome_resources.gyp

Index: chrome/chrome_resources.gyp
diff --git a/chrome/chrome_resources.gyp b/chrome/chrome_resources.gyp
index 18f88fb0a4b503b43e20d1f6c1ee9879545f04cc..31de62b2dbc775040d82283d45c1c552e7e9f2c4 100644
--- a/chrome/chrome_resources.gyp
+++ b/chrome/chrome_resources.gyp
@@ -217,6 +217,13 @@
           },
           'includes': [ '../build/grit_action.gypi' ],
         },
+        {
+          'action_name': 'theme_resources_metro_1x',
+          'variables': {
+            'grit_grd_file': 'app/theme/theme_resources_metro_1x.grd',
+          },
+          'includes': [ '../build/grit_action.gypi' ],
+        },
       ],
       'includes': [ '../build/grit_target.gypi' ],
     },
@@ -260,6 +267,16 @@
             },
           ],
         }],
+        ['enable_metro == 1', {
+          'copies': [
+            {
+              'destination': '<(PRODUCT_DIR)',
+              'files': [
+                '<(grit_out_dir)/theme_resources_metro_1x.pak',
+              ],
+            },
+          ],
+        }],
       ],
     },
     {