Early return if we find selected shipping option from last.

third_party/WebKit/Source/modules/payments/PaymentRequest.cpp

Index: third_party/WebKit/Source/modules/payments/PaymentRequest.cpp
diff --git a/third_party/WebKit/Source/modules/payments/PaymentRequest.cpp b/third_party/WebKit/Source/modules/payments/PaymentRequest.cpp
index 294efb8b5f8874240c440db7441eca8782220154..ebd37747826b9175c001eeb3fd8abb5e3a8d1584 100644
--- a/third_party/WebKit/Source/modules/payments/PaymentRequest.cpp
+++ b/third_party/WebKit/Source/modules/payments/PaymentRequest.cpp
@@ -337,9 +337,9 @@ String getSelectedShippingOption(const PaymentDetails& details)
     if (!details.hasShippingOptions())
         return result;
 
-    for (size_t i = 0; i < details.shippingOptions().size(); ++i) {
+    for (int i = details.shippingOptions().size() - 1; i >= 0; --i) {
         if (details.shippingOptions()[i].hasSelected() && details.shippingOptions()[i].selected()) {
-            result = details.shippingOptions()[i].id();
+            return details.shippingOptions()[i].id();
         }
     }