ICU msg format support with more than one arguments

extensions/extensions_strings.grd

Index: extensions/extensions_strings.grd
diff --git a/extensions/extensions_strings.grd b/extensions/extensions_strings.grd
index dd407b0676453382dddc0d36c0dad4645b74040f..3e602b09635013b03dc4e6e2cb2dfd5f2aa23e43 100644
--- a/extensions/extensions_strings.grd
+++ b/extensions/extensions_strings.grd
@@ -365,23 +365,21 @@
       <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>
-      <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>
-      <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_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_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_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