Allow chrome_shell_paks target to be reused

chrome/chrome_android_paks.gypi

Index: chrome/chrome_android_paks.gypi
diff --git a/chrome/chrome_android_paks.gypi b/chrome/chrome_android_paks.gypi
index 574d5ccc545bf34fb0a83125a56f83f0808b4216..46c75ddc55dc764d77761f968545bdbb514f4c31 100644
--- a/chrome/chrome_android_paks.gypi
+++ b/chrome/chrome_android_paks.gypi
@@ -121,5 +121,23 @@
       }],
     ],
   },
+  'targets': [
+    {
+      'target_name': 'chrome_shell_paks_copy',

[newt (away), 2015/01/20 18:15:53]

I'd call this "chrome_android_paks_copy", since this can now be depended on by
targets other than Chrome Shell.

+      'type': 'none',
+      'dependencies': [
+        '<(DEPTH)/chrome/chrome_resources.gyp:packed_resources',
+        '<(DEPTH)/chrome/chrome_resources.gyp:packed_extra_resources',
+      ],
+      'copies': [
+        {
+          'destination': '<(chrome_android_pak_output_folder)',
+          'files': [
+            '<@(chrome_android_pak_input_resources)',
+          ],
+        }
+      ],
+    },
+  ],
 }