[Payment Request] Improved matching for the UIAlertView in showcase egtests

ios/showcase/common/protocol_alerter.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/showcase/common/protocol_alerter.h"
 
 #import <objc/runtime.h>
 
 #import "base/logging.h"
 #import "base/strings/sys_string_conversions.h"
@@ skipping 143 matching lines @@
 // Return a string describing the argument value at |index|.
 // (|index| is in NSInvocation's argument array).
 - (NSString*)argumentDescriptionAtIndex:(NSInteger)index {
   const char* type = [self.methodSignature getArgumentTypeAtIndex:index];
 
   switch (*type) {
     case '@':
       return [self objectDescriptionAtIndex:index];
     case 'q':
       return [self longLongDescriptionAtIndex:index];
+    case 'Q':
+      return [self unsignedLongLongDescriptionAtIndex:index];
     // Add cases as needed here.
     default:
       return [NSString stringWithFormat:@"<Unknown Type:%s>", type];
   }
 }
 
 // Return a string describing an argument at |index| that's known to be an
 // objective-C object.
 - (NSString*)objectDescriptionAtIndex:(NSInteger)index {
   __unsafe_unretained id object;
@@ skipping 29 matching lines @@
 
 // Returns a string describing an argument at |index| that is known to be a long
 // long.
 - (NSString*)longLongDescriptionAtIndex:(NSInteger)index {
   long long value;
 
   [self getArgument:&value atIndex:index];
   return [NSString stringWithFormat:@"%lld", value];
 }
 
+// Returns a string describing an argument at |index| that is known to be an
+// unsigned long long.
+- (NSString*)unsignedLongLongDescriptionAtIndex:(NSInteger)index {
+  unsigned long long value;
+
+  [self getArgument:&value atIndex:index];
+  return [NSString stringWithFormat:@"%llu", value];
+}
+
 @end