Add support for providing an external file for extracting content.

components/dom_distiller/content/distiller_page_web_contents.h

 // Copyright 2013 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.
 
 #ifndef COMPONENTS_DOM_DISTILLER_CONTENT_DISTILLER_PAGE_WEB_CONTENTS_H_
 #define COMPONENTS_DOM_DISTILLER_CONTENT_DISTILLER_PAGE_WEB_CONTENTS_H_
 
 #include <string>
 
 #include "base/memory/scoped_ptr.h"
@@ skipping 13 matching lines @@
 
   scoped_ptr<content::WebContents> GetWebContents();
 
  private:
   // The WebContents this class owns.
   scoped_ptr<content::WebContents> web_contents_;
 };
 
 class DistillerPageWebContentsFactory : public DistillerPageFactory {
  public:
-  explicit DistillerPageWebContentsFactory(
-      content::BrowserContext* browser_context)
-      : DistillerPageFactory(), browser_context_(browser_context) {}
+  DistillerPageWebContentsFactory(content::BrowserContext* browser_context,
+                                  const std::string& distiller_js_script);
   ~DistillerPageWebContentsFactory() override {}
 
   scoped_ptr<DistillerPage> CreateDistillerPage(
       const gfx::Size& render_view_size) const override;
   scoped_ptr<DistillerPage> CreateDistillerPageWithHandle(
       scoped_ptr<SourcePageHandle> handle) const override;
 
  private:
   content::BrowserContext* browser_context_;
+  // Contains the script which will be passed on when constructing the
+  // DistillerPageWebContents. It should contain the string $$OPTIONS, which
+  // will be replaced with options passed in as proto::DomDistillerOptions
+  // before it is executed in the page context.
+  std::string distiller_js_script_;
 };
 
 class DistillerPageWebContents : public DistillerPage,
                                  public content::WebContentsDelegate,
                                  public content::WebContentsObserver {
  public:
   DistillerPageWebContents(
       content::BrowserContext* browser_context,
       const gfx::Size& render_view_size,
+      const std::string& distiller_js_script,
       scoped_ptr<SourcePageHandleWebContents> optional_web_contents_handle);
   ~DistillerPageWebContents() override;
 
   // content::WebContentsDelegate implementation.
   gfx::Size GetSizeForNewRenderView(
       content::WebContents* web_contents) const override;
 
   // content::WebContentsObserver implementation.
   void DocumentLoadedInFrame(
       content::RenderFrameHost* render_frame_host) override;
@@ skipping 41 matching lines @@
 
   scoped_ptr<content::WebContents> web_contents_;
   content::BrowserContext* browser_context_;
   gfx::Size render_view_size_;
   DISALLOW_COPY_AND_ASSIGN(DistillerPageWebContents);
 };
 
 }  // namespace dom_distiller
 
 #endif  // COMPONENTS_DOM_DISTILLER_CONTENT_DISTILLER_PAGE_WEB_CONTENTS_H_