[Payment Request] Payment request summary view pending state

components/payments_strings.grdp

 <?xml version="1.0" encoding="utf-8"?>
 <grit-part>
 
   <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">
     Save this card to this device
   </message>
   <message name="IDS_PAYMENTS_ACCEPTED_CARDS_LABEL" desc="The title for the section that displays the credit card types that the merchant accepts." formatter_data="android_java">
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   </message>
   <message name="IDS_PAYMENTS_EDIT_BUTTON" desc="The label for the button that lets the user edit their payment options." formatter_data="android_java">
     Edit
   </message>
   <message name="IDS_PAYMENTS_PAY_BUTTON" desc="The label for the button that finishes the payment process." formatter_data="android_java">
     Pay
   </message>
   <message name="IDS_PAYMENTS_LOADING_MESSAGE" desc="The text that informs the user that payment information is being loaded up." formatter_data="android_java">
     Loading
   </message>
+  <message name="IDS_PAYMENTS_PROCESSING_MESSAGE" desc="The text that informs the user that payment is being processed." formatter_data="android_java">
+    Processing
+  </message>
   <message name="IDS_PAYMENTS_ERROR_MESSAGE" desc="The text that informs the user that there is error in verifying and charging the payment." formatter_data="android_java">
     There was an error processing your order.  Please check your account and try again.
   </message>
   <message name="IDS_PAYMENTS_ADD_CONTACT" desc="Text on a button that lets a user add new contact details, like the user's full name, an email address or a phone number." formatter_data="android_java">
     Add contact info
   </message>
   <message name="IDS_PAYMENTS_CHECKING_OPTION" desc="Text explaining that the option the user selected is being checked and verified." formatter_data="android_java">
     Checking
   </message>
   <message name="IDS_PAYMENTS_UPDATED_LABEL" desc="The text that informs the user that the total value of their cart has been updated." formatter_data="android_java">
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   <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>
 </grit-part>