Increases the depth of parsing dictionaries returned by JS evaluation

ios/web/web_state/ui/web_view_js_utils.mm

 // Copyright 2014 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/web/web_state/ui/web_view_js_utils.h"
 
 #include <CoreFoundation/CoreFoundation.h>
 #import <WebKit/WebKit.h>
 
 #include "base/logging.h"
@@ skipping 60 matching lines @@
     NOTREACHED();  // Convert other types as needed.
   }
   return result;
 }
 
 }  // namespace
 
 namespace web {
 
 NSString* const kJSEvaluationErrorDomain = @"JSEvaluationError";
-int const kMaximumParsingRecursionDepth = 6;
+int const kMaximumParsingRecursionDepth = 8;
 
 std::unique_ptr<base::Value> ValueResultFromWKResult(id wk_result) {
   return ::ValueResultFromWKResult(wk_result, kMaximumParsingRecursionDepth);
 }
 
 void ExecuteJavaScript(WKWebView* web_view,
                        NSString* script,
                        JavaScriptResultBlock completion_handler) {
   DCHECK([script length]);
   if (!web_view && completion_handler) {
     dispatch_async(dispatch_get_main_queue(), ^{
       NSString* error_message =
           @"JS evaluation failed because there is no web view.";
       base::scoped_nsobject<NSError> error([[NSError alloc]
           initWithDomain:kJSEvaluationErrorDomain
                     code:JS_EVALUATION_ERROR_CODE_NO_WEB_VIEW
                 userInfo:@{NSLocalizedDescriptionKey : error_message}]);
       completion_handler(nil, error);
     });
     return;
   }
 
   [web_view evaluateJavaScript:script completionHandler:completion_handler];
 }
 
 }  // namespace web