ICU msg format support with more than one arguments

extensions/extensions_strings.grd

 <?xml version="1.0" encoding="utf-8"?>
 
 <!--
   Strings for the extensions module. Used mostly for low-level error messages.
   Where possible new strings should be kept in Chrome and the extensions module
   should return an error code, message flag, etc.
 -->
 
 <grit latest_public_release="0" current_release="1"
       source_lang_id="en" enc_check="möl">
@@ skipping 347 matching lines @@
       </message>
       <message name="IDS_DEVICE_NAME_WITH_UNKNOWN_PRODUCT_VENDOR_SERIAL" desc="String describing a device by its vendor name and serial number when only the numeric product ID is available.">
         Unknown product <ph name="PRODUCT_ID">$1<ex>1234</ex></ph> from <ph name="VENDOR_NAME">$2<ex>Griffin Technology</ex></ph> (serial number <ph name="SERIAL_NUMBER">$3<ex>00001</ex></ph>)
       </message>
       <message name="IDS_DEVICE_NAME_WITH_UNKNOWN_PRODUCT_UNKNOWN_VENDOR" desc="String describing a device when only numeric vendor and product IDs are available.">
         Unknown product <ph name="PRODUCT_ID">$1<ex>1234</ex></ph> from vendor <ph name="VENDOR_ID">$2<ex>abcd</ex></ph>
       </message>
       <message name="IDS_DEVICE_NAME_WITH_UNKNOWN_PRODUCT_UNKNOWN_VENDOR_SERIAL" desc="String describing a device by its serial number when only numeric vendor and product IDs are available.">
         Unknown product <ph name="PRODUCT_ID">$1<ex>1234</ex></ph> from vendor <ph name="VENDOR_ID">$2<ex>abcd</ex></ph> (serial number <ph name="SERIAL_NUMBER">$3<ex>00001</ex></ph>)
       </message>
-      <message name="IDS_DEVICE_PERMISSIONS_PROMPT_MULTIPLE" desc="Instructions asking the user to select one or more devices for use with an app.">
-        The application "<ph name="APP_NAME">$1<ex>Chrome Dev Editor</ex></ph>" is requesting access to one or more of your devices.
+      <message name="IDS_DEVICE_PERMISSIONS_PROMPT" desc="Instructions asking the user to select one or more devices for use with an app. [ICU Syntax]">
+      {0, select,
+        single {The application "<ph name="APP_NAME">{1}<ex>Chrome Dev Editor</ex></ph>" is requesting access to one of your devices.}
+        multiple {The application "<ph name="APP_NAME">{1}<ex>Chrome Dev Editor</ex></ph>" is requesting access to one or more of your devices.}

[Avi (use Gerrit), 2015/07/30 19:19:49]

Don't we know that it's more than one? "One of more" still is ambiguous, so if
we know, can we say "... is requesting access to your devices"?

[Reilly Grant (use Gerrit), 2015/07/30 19:22:07]

No, this is the message for a selection dialog that allows multiple selection.
The user could select one, or they could select more than one. The purpose of
the difference in messaging is to inform the user of their choices.

[jungshik at Google, 2015/07/31 21:36:15]

Yeah.... There are cases where we need to have 'two-way' branches and
translators/linguists so far have come up with something reasonable. 

+        other {UNUSED}}
       </message>
-      <message name="IDS_DEVICE_PERMISSIONS_PROMPT_SINGLE" desc="Instructions asking the user to select one device for use with an app.">
-        The application "<ph name="APP_NAME">$1<ex>Chrome Dev Editor</ex></ph>" is requesting access to one of your devices.
+      <message name="IDS_HID_DEVICE_PERMISSIONS_PROMPT_TITLE" desc="Title of the HID device selection dialog when the app will accept one or more selected devices. [ICU Syntax]">
+      {1, select,
+       single {Select a HID device} multiple {Select HID devices}
+       other {UNUSED}}
       </message>
-      <message name="IDS_HID_DEVICE_PERMISSIONS_PROMPT_TITLE_MULTIPLE" desc="Title of the HID device selection dialog when the app will accept one or more selected devices.">
-        Select HID devices
-      </message>
-      <message name="IDS_HID_DEVICE_PERMISSIONS_PROMPT_TITLE_SINGLE" desc="Title of the HID device selection dialog when the app wants only one device selected.">
-        Select a HID device
-      </message>
-      <message name="IDS_USB_DEVICE_PERMISSIONS_PROMPT_TITLE_MULTIPLE" desc="Title of the USB device selection dialog when the app will accept one or more selected devices.">
-        Select USB devices
-      </message>
-      <message name="IDS_USB_DEVICE_PERMISSIONS_PROMPT_TITLE_SINGLE" desc="Title of the USB device selection dialog when the app wants only one device selected.">
-        Select a USB device
+      <message name="IDS_USB_DEVICE_PERMISSIONS_PROMPT_TITLE" desc="Title of the USB device selection dialog when the app will accept one or more selected devices. [ICU Syntax]">
+      {1, select,
+       single {Select a USB device} multiple {Select USB devices}
+       other {UNUSED}}
       </message>
       <message name="IDS_EXTENSION_PROMPT_WARNING_NETWORKING_CONFIG" desc="Permission string for Networking Config API.">
         Configure network connections
       </message>
       <message name="IDS_EXTENSION_PROMPT_WARNING_NETWORKING_PRIVATE" desc="Permission string for Networking Private API.">
         Manage network connections
       </message>
       <message name="IDS_EXTENSION_PROMPT_WARNING_SERIAL" desc="Permission string for access to serial devices.">
         Access your serial devices
       </message>
@@ skipping 105 matching lines @@
       <!-- Utility process names. Please keep alphabetized. -->
       <message name="IDS_UTILITY_PROCESS_EXTENSION_UNPACKER_NAME" desc="The name of the utility process used for unpacking extensions.">
         Extension Unpacker
       </message>
       <message name="IDS_UTILITY_PROCESS_MANIFEST_PARSER_NAME" desc="The name of the utility process used for parsing extension manifests.">
         Extension Manifest Parser
       </message>
     </messages>
   </release>
 </grit>