Add support for providing an external file for extracting content.

components/dom_distiller/content/distiller_page_web_contents.cc

Index: components/dom_distiller/content/distiller_page_web_contents.cc
diff --git a/components/dom_distiller/content/distiller_page_web_contents.cc b/components/dom_distiller/content/distiller_page_web_contents.cc
index 4c6ff1c6e07ca1eb93a07d35be8b7caa533f9afa..7ebe87a1104c39893207b355036af480066f4a2c 100644
--- a/components/dom_distiller/content/distiller_page_web_contents.cc
+++ b/components/dom_distiller/content/distiller_page_web_contents.cc
@@ -34,11 +34,19 @@ scoped_ptr<content::WebContents> SourcePageHandleWebContents::GetWebContents() {
   return web_contents_.Pass();
 }
 
+DistillerPageWebContentsFactory::DistillerPageWebContentsFactory(
+    content::BrowserContext* browser_context,
+    const std::string& distiller_js_script)
+    : DistillerPageFactory(),
+      browser_context_(browser_context),
+      distiller_js_script_(distiller_js_script) {
+}
+
 scoped_ptr<DistillerPage> DistillerPageWebContentsFactory::CreateDistillerPage(
     const gfx::Size& render_view_size) const {
   DCHECK(browser_context_);
   return scoped_ptr<DistillerPage>(new DistillerPageWebContents(
-      browser_context_, render_view_size,
+      browser_context_, render_view_size, distiller_js_script_,
       scoped_ptr<SourcePageHandleWebContents>()));
 }
 
@@ -50,14 +58,18 @@ DistillerPageWebContentsFactory::CreateDistillerPageWithHandle(
       scoped_ptr<SourcePageHandleWebContents>(
           static_cast<SourcePageHandleWebContents*>(handle.release()));
   return scoped_ptr<DistillerPage>(new DistillerPageWebContents(
-      browser_context_, gfx::Size(), web_contents_handle.Pass()));
+      browser_context_, gfx::Size(), distiller_js_script_,
+      web_contents_handle.Pass()));
 }
 
 DistillerPageWebContents::DistillerPageWebContents(
     content::BrowserContext* browser_context,
     const gfx::Size& render_view_size,
+    const std::string& distiller_js_script,
     scoped_ptr<SourcePageHandleWebContents> optional_web_contents_handle)
-    : state_(IDLE), browser_context_(browser_context),
+    : DistillerPage(distiller_js_script),
+      state_(IDLE),
+      browser_context_(browser_context),
       render_view_size_(render_view_size) {
   if (optional_web_contents_handle) {
     web_contents_ = optional_web_contents_handle->GetWebContents().Pass();