Upstream Chrome on iOS source code [2/11].

ios/chrome/browser/payments/js_payment_request_manager.h

+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef IOS_CHROME_BROWSER_PAYMENTS_JS_PAYMENT_REQUEST_MANAGER_H_
+#define IOS_CHROME_BROWSER_PAYMENTS_JS_PAYMENT_REQUEST_MANAGER_H_
+
+#import "ios/web/public/web_state/js/crw_js_injection_manager.h"
+
+namespace web {
+class PaymentResponse;
+}
+
+// Injects the JavaScript that implements the Payment Request API and provides
+// an app-side interface for interacting with it.
+@interface JSPaymentRequestManager : CRWJSInjectionManager
+
+// Resolves the JavaScript promise associated with the current PaymentRequest
+// with the a JSON serialization of |paymentResponse|. |completionHandler| will
+// be invoked after the operation has completed with YES if successful.
+- (void)resolveRequestPromise:(const web::PaymentResponse&)paymentResponse
+            completionHandler:(void (^)(BOOL))completionHandler;
+
+// Rejects the JavaScript promise associated with the current PaymentRequest
+// with the supplied |errorMessage|. |completionHandler| will be invoked after
+// the operation has completed with YES if successful.
+- (void)rejectRequestPromise:(NSString*)errorMessage
+           completionHandler:(void (^)(BOOL))completionHandler;
+
+// Resolves the JavaScript promise associated with the current PaymentResponse.
+// |completionHandler| will be invoked after the operation has completed with
+// YES if successful.
+- (void)resolveResponsePromise:(void (^)(BOOL))completionHandler;
+
+// Rejects the JavaScript promise associated with the current PaymentResponse
+// with the supplied |errorMessage|. |completionHandler| will be invoked after
+// the operation has completed with YES if successful.
+- (void)rejectResponsePromise:(NSString*)errorMessage
+            completionHandler:(void (^)(BOOL))completionHandler;
+
+@end
+
+#endif  // IOS_CHROME_BROWSER_PAYMENTS_JS_PAYMENT_REQUEST_MANAGER_H_