[Payments] Reject canMakePayment() after show().

Spec:
https://w3c.github.io/payment-request/#canmakepayment()-method

"If request.[[state]] is not "created", then return a promise rejected
with an "InvalidStateError" DOMException."

(After show() was called, request.[[state]] is "interactive".)

Bug: 766176
Change-Id: I05a0804bc8324a2a65dd5e3128422507269cf117
Reviewed-on: https://chromium-review.googlesource.com/671610Reviewed-by: Ganggui Tang <gogerald@chromium.org>
Commit-Queue: Rouslan Solomakhin <rouslan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#502896}

third_party/WebKit/LayoutTests/external/wpt/payment-request/payment-request-canmakepayment-method.https-expected.txt

 This is a testharness.js-based test.
 Harness Error. harness_status.status = 1 , harness_status.message = Request failed
 FAIL If request.[[state]] is "created", then return a promise that resolves to true for known method. assert_equals: if it throws, then it must be a NotAllowedError. expected "NotAllowedError" but got "UnknownError"
-FAIL If request.[[state]] is "interactive", then return a promise rejected with an "InvalidStateError" DOMException. promise_test: Unhandled rejection with value: object "InvalidStateError: Never called show(), so nothing to abort"
+FAIL If request.[[state]] is "interactive", then return a promise rejected with an "InvalidStateError" DOMException. promise_test: Unhandled rejection with value: object "UnknownError: Request failed"
 FAIL If request.[[state]] is "closed", then return a promise rejected with an "InvalidStateError" DOMException. promise_test: Unhandled rejection with value: object "UnknownError: Request failed"
 FAIL If payment method identifier and serialized parts are supported, resolve promise with true. promise_test: Unhandled rejection with value: object "UnknownError: Request failed"
 FAIL If payment method identifier is unknown, resolve promise with false. assert_true: Unexpected exception testing method this-is-not-supported, expected false. See error console. expected true got false

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

@@ -884,8 +884,8 @@ ScriptPromise PaymentRequest::abort(ScriptState* script_state) {
 }
 
 ScriptPromise PaymentRequest::canMakePayment(ScriptState* script_state) {
-  if (!payment_provider_.is_bound() || can_make_payment_resolver_ ||
-      !script_state->ContextIsValid()) {
+  if (!payment_provider_.is_bound() || show_resolver_ ||
+      can_make_payment_resolver_ || !script_state->ContextIsValid()) {
     return ScriptPromise::RejectWithDOMException(
         script_state, DOMException::Create(kInvalidStateError,
                                            "Cannot query payment request"));