Rename remaining types so that all begin Payment*

third_party/WebKit/Source/modules/payments/CurrencyAmount.idl

Index: third_party/WebKit/Source/modules/payments/CurrencyAmount.idl
diff --git a/third_party/WebKit/Source/modules/payments/CurrencyAmount.idl b/third_party/WebKit/Source/modules/payments/CurrencyAmount.idl
index a92763be651fe5c14dff89bb317161b7efaf4471..ce0affeaf71e67633312ab496238aae60d549b26 100644
--- a/third_party/WebKit/Source/modules/payments/CurrencyAmount.idl
+++ b/third_party/WebKit/Source/modules/payments/CurrencyAmount.idl
@@ -5,8 +5,9 @@
 // https://w3c.github.io/browser-payment-api/specs/paymentrequest.html#currencyamount
 
 [
-    RuntimeEnabled=PaymentRequest
-] dictionary CurrencyAmount {
+    RuntimeEnabled=PaymentRequest,
+    ImplementedAs=CurrencyAmount

[please use gerrit instead, 2016/06/09 20:43:51]

I prefer to not have ImplementedAs=, unless absolutely necessary. I recommend
that you go through all of the code in Chrome that mentions CurrencyAmount and
rename it to PaymentCurrencyAmount. This will make maintenance more
straightforward for us.

+] dictionary PaymentCurrencyAmount {
     required DOMString currency;
     required DOMString value;
 };