Add support for webapk without runtimeHost

chrome/android/webapk/strings/android_webapk_strings.grd

Index: chrome/android/webapk/strings/android_webapk_strings.grd
diff --git a/chrome/android/webapk/strings/android_webapk_strings.grd b/chrome/android/webapk/strings/android_webapk_strings.grd
index 40f53e59de0f492cda77f5c8c194b01144f27351..45ab82e39ee3ce469b68202eeb8489339f283c61 100644
--- a/chrome/android/webapk/strings/android_webapk_strings.grd
+++ b/chrome/android/webapk/strings/android_webapk_strings.grd
@@ -100,7 +100,12 @@
       <message name="IDS_CHOOSE_HOST_BROWSER" desc="Content for the host browser picker dialog, which is used to ask users to pick a browser to launch the installed WebAPK.">
         Please select the browser you'd like to use to run <ph name="WEBAPK_SITE">%1$s<ex>Housing.com</ex></ph>
       </message>
-      
+      <message name="IDS_CHOOSE_HOST_BROWSER_DIALOG_QUIT" desc="Text for the cancel button on the dialog. ">
+        QUIT
+      </message>
+      <message name="IDS_HOST_BROWSER_ITEM_UNSUPPORTING_WEBAPK" desc="Text for the host browser item that doesn't support WebAPKs on the choose host browser dialog. ">

[pkotwicz, 2017/06/06 17:16:22]

IDS_HOST_BROWSER_ITEM_NOT_SUPPORTING_WEBAPKS

[Xi Han, 2017/06/06 17:23:43]

Done.

+        <ph name="BROWSER_NAME">%1$s<ex>Chrome</ex></ph>\nUnsupported by <ph name="WEBAPK_SITE">%2$s<ex>Housing.com</ex></ph>
+      </message>
     </messages>
   </release>
 </grit>