Add support for providing an external file for extracting content.

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 26 matching lines @@
   DCHECK(distiller_page_);
 }
 
 void DistillerWebStateObserver::PageLoaded(
     web::PageLoadCompletionStatus load_completion_status) {
   distiller_page_->OnLoadURLDone(load_completion_status);
 }
 
 #pragma mark -
 
-DistillerPageIOS::DistillerPageIOS(web::BrowserState* browser_state)
-    : browser_state_(browser_state), weak_ptr_factory_(this) {
+DistillerPageIOS::DistillerPageIOS(web::BrowserState* browser_state,
+                                   const std::string& distiller_js_script)
+    : DistillerPage(distiller_js_script),
+      browser_state_(browser_state),
+      weak_ptr_factory_(this) {
 }
 
 DistillerPageIOS::~DistillerPageIOS() {
 }
 
 void DistillerPageIOS::DistillPageImpl(const GURL& url,
                                        const std::string& script) {
   if (!url.is_valid() || !script.length())
     return;
   url_ = url;
@@ skipping 43 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