PaymentRequest: complete() method should take PaymentComplete enum value.

third_party/WebKit/Source/modules/payments/PaymentCompleter.h

Index: third_party/WebKit/Source/modules/payments/PaymentCompleter.h
diff --git a/third_party/WebKit/Source/modules/payments/PaymentCompleter.h b/third_party/WebKit/Source/modules/payments/PaymentCompleter.h
index 284d2a16d9e36bd5fd29e549b4ec85daff423cc3..70e5c80fe078449e1da0b181ac6124047c2e8015 100644
--- a/third_party/WebKit/Source/modules/payments/PaymentCompleter.h
+++ b/third_party/WebKit/Source/modules/payments/PaymentCompleter.h
@@ -11,11 +11,17 @@
 
 namespace blink {
 
+enum PaymentComplete {
+    Success,
+    Fail,
+    Unknown
+};
+
 class ScriptState;
 
 class MODULES_EXPORT PaymentCompleter : public GarbageCollectedMixin {
 public:
-    virtual ScriptPromise complete(ScriptState*, bool success) = 0;
+    virtual ScriptPromise complete(ScriptState*, PaymentComplete result) = 0;
 
 protected:
     virtual ~PaymentCompleter() {}