Pass more information by argument to the dom_distiller script.

components/dom_distiller/ios/distiller_page_ios.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.
 
 #include "components/dom_distiller/ios/distiller_page_ios.h"
 
 #import <UIKit/UIKit.h>
 
 #include "base/json/json_reader.h"
 #include "base/logging.h"
@@ skipping 33 matching lines @@
 
 #pragma mark -
 
 DistillerPageIOS::DistillerPageIOS(web::BrowserState* browser_state)
     : browser_state_(browser_state), weak_ptr_factory_(this) {
 }
 
 DistillerPageIOS::~DistillerPageIOS() {
 }
 
+bool DistillerPageIOS::StringifyOutput() {
+ // UIWebView requires JavaScript to return a single string value.
+ return true;
+}
+
+bool DistillerPageIOS::CreateNewContext() {
+  // UIWebView's JavaScript engine has a bug that causes crashes when
+  // creating a separate window object, so allow the script to run directly
+  // in the window until a better solution is created.
+  // TODO(kkhorimoto): investigate whether this is necessary for WKWebView.
+ return false;
+}
+
 void DistillerPageIOS::DistillPageImpl(const GURL& url,
                                        const std::string& script) {
   if (!url.is_valid() || !script.length())
     return;
   url_ = url;
   script_ = script;
 
   // Lazily create provider.
   if (!provider_) {
     if (ios::GetWebControllerProviderFactory()) {
@@ skipping 38 matching lines @@
         base::JSONReader::Read(base::SysNSStringToUTF8(result)));
     if (dictionaryValue &&
         dictionaryValue->IsType(base::Value::TYPE_DICTIONARY)) {
       resultValue = dictionaryValue.Pass();
     }
   }
   OnDistillationDone(url_, resultValue.get());
 }
 
 }  // namespace dom_distiller