EarlGrey tests for Payment Request (base CL)

ios/chrome/app/strings/ios_strings.grd

Index: ios/chrome/app/strings/ios_strings.grd
diff --git a/ios/chrome/app/strings/ios_strings.grd b/ios/chrome/app/strings/ios_strings.grd
index 3c95b181313bb604102cb2c824d144050a6644f3..e5f883ec3421574ed5067243cd61a38f5c1e2291 100644
--- a/ios/chrome/app/strings/ios_strings.grd
+++ b/ios/chrome/app/strings/ios_strings.grd
@@ -972,6 +972,9 @@ Handoff must also be enabled in the General section of Settings, and your device
       <message name="IDS_IOS_PAYMENT_REQUEST_PAY_BUTTON" desc="Label of the button to confirm that the user wishes to pay for a good or service [iOS only].">
         Pay
       </message>
+      <message name="IDS_IOS_ACCNAME_PAYMENT_REQUEST_PAY_BUTTON" desc="The accessible name for the button to confirm that the user wishes to pay for a good or service [iOS only].">

[Justin Donnelly, 2016/12/29 18:36:57]

Is this used? I didn't see it when looking through this CL. Regardless, I don't
think we should need it. The button already has a text label which will be used
for accessibility.

[Moe, 2017/01/03 17:42:19]

Done. It was being used in payment_request_view_controller.mm, but you're right.
It's not needed.

+        Pay
+      </message>
       <message name="IDS_IOS_PAYMENT_REQUEST_TITLE" desc="Title of the dialog that presents a request for payment for some good or service [iOS only].">
         Your Payment
       </message>