[Payment Request] CanMakePayment

ios/chrome/browser/ui/payments/js_payment_request_manager.mm

 // 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.
 
 #import "ios/chrome/browser/ui/payments/js_payment_request_manager.h"
 
 #include "base/json/json_writer.h"
 #include "base/json/string_escape.h"
 #include "base/memory/ptr_util.h"
 #include "base/strings/sys_string_conversions.h"
@@ skipping 53 matching lines @@
   NSString* script = [NSString
       stringWithFormat:
           @"__gCrWeb['paymentRequestManager'].rejectRequestPromise(%@)",
           JSONEscape(errorMessage)];
   [self executeScript:script completionHandler:completionHandler];
 }
 
 - (void)resolveCanMakePaymentPromiseWithValue:(bool)value
                             completionHandler:
                                 (ProceduralBlockWithBool)completionHandler {
-  NSString* script = value ? @"__gCrWeb['paymentRequestManager']."
-                             @"resolveCanMakePaymentPromise(true)"
-                           : @"__gCrWeb['paymentRequestManager']."
-                             @"resolveCanMakePaymentPromise(false)";
+  NSString* script = [NSString
+      stringWithFormat:
+          @"__gCrWeb['paymentRequestManager'].resolveCanMakePaymentPromise(%@)",
+          value ? @"true" : @"false"];
   [self executeScript:script completionHandler:completionHandler];
 }
 
+- (void)rejectCanMakePaymentPromiseWithErrorMessage:(NSString*)errorMessage
+                                  completionHandler:(ProceduralBlockWithBool)
+                                                        completionHandler {
+  NSString* script = [NSString
+      stringWithFormat:
+          @"__gCrWeb['paymentRequestManager'].rejectCanMakePaymentPromise(%@)",
+          JSONEscape(errorMessage)];
+  [self executeScript:script completionHandler:completionHandler];
+}
+
 - (void)resolveAbortPromiseWithCompletionHandler:
     (ProceduralBlockWithBool)completionHandler {
   NSString* script = @"__gCrWeb['paymentRequestManager'].resolveAbortPromise()";
   [self executeScript:script completionHandler:completionHandler];
 }
 
 - (void)resolveResponsePromiseWithCompletionHandler:
     (ProceduralBlockWithBool)completionHandler {
   NSString* script =
       @"__gCrWeb['paymentRequestManager'].resolveResponsePromise()";
@@ skipping 31 matching lines @@
         }];
 }
 
 #pragma mark - Protected methods
 
 - (NSString*)presenceBeacon {
   return @"__gCrWeb.paymentRequestManager";
 }
 
 @end