Make payment manifest download/parse cross-platform

components/payments_strings.grdp

 <?xml version="1.0" encoding="utf-8"?>
 <grit-part>
 
   <message name="IDS_PAYMENTS_TITLE" desc="Title of the dialog that presents a request for payment for some good or service [Desktop and iOS only].">
     Your Payment
   </message>
   <message name="IDS_PAYMENTS_NAME_FIELD_IN_CONTACT_DETAILS" desc="The label for text input field containing the full name of a person. [CHAR-LIMIT=32]" formatter_data="android_java">
     Name
   </message>
   <message name="IDS_PAYMENTS_SAVE_CARD_TO_DEVICE_CHECKBOX" desc="The label for the checkbox that enables the user to save a credit card to their device, for example, on their phone." formatter_data="android_java">
@@ skipping 231 matching lines @@
   <message name="IDS_PAYMENTS_UNSUPPORTED_PICKUP_ADDRESS" desc="Text implying that a user needs to choose a different pickup address, because the currently selected address is not supported. This address can be used, for example, for laundry pickup." formatter_data="android_java">
     Unsupported pickup address. Select a different address.
   </message>
   <message name="IDS_PAYMENTS_UNSUPPORTED_PICKUP_OPTION" desc="Text implying that a user needs to choose a different pickup option, because the currently selected option is not supported. This option can be used, for example, for laundry pickup." formatter_data="android_java">
     That pickup option isn’t available. Try a different option.
   </message>
   <message name="IDS_PAYMENTS_ANDROID_APP_ERROR" desc="Error message that is shown when an Android payment application fails to start." formatter_data="android_java">
     Unable to launch payment app.
   </message>
 
+  <message name="IDS_UTILITY_PROCESS_PAYMENT_MANIFEST_PARSER_NAME" desc="The name of the utility process used for parsing manifest files.">
+    Manifest Parser

[Mathieu, 2017/03/21 20:18:12]

Payment Manifest Parser? If I saw "Manifest Parser" in the process list I'd be
kind of lost

[please use gerrit instead, 2017/03/21 20:34:52]

Done.

+  </message>
   <if expr="is_android">
-    <message name="IDS_UTILITY_PROCESS_MANIFEST_PARSER_NAME" desc="The name of the utility process used for parsing manifest files.">
-      Manifest Parser
-  </message>
     <message name="IDS_EXTERNAL_PAYMENT_APP_LEAVE_INCOGNITO_WARNING" desc="Alert dialog text warning the user that incognito mode does not conitnue into external payment apps." formatter_data="android_java">
       Leaving incognito mode to pay via an external application. Continue?
     </message>
   </if>
 </grit-part>