Pass more information by argument to the dom_distiller script.

components/dom_distiller/core/distiller_page.h

Index: components/dom_distiller/core/distiller_page.h
diff --git a/components/dom_distiller/core/distiller_page.h b/components/dom_distiller/core/distiller_page.h
index 74cf277935b81809bb979aae01e37bac2aa2a2d0..e80bc59535a5ed2b950a322b69709aea6f503010 100644
--- a/components/dom_distiller/core/distiller_page.h
+++ b/components/dom_distiller/core/distiller_page.h
@@ -55,6 +55,14 @@ class DistillerPage {
   // should be the same regardless of the DistillerPage implementation.
   virtual void DistillPageImpl(const GURL& url, const std::string& script) = 0;
 
+  // The value returned between the JavaScript and the DistillerPage can be
+  // either a dictionary with all the content, or a stringified version.
+  virtual bool StringifyOutput() = 0;
+
+  // If true, forces the creation of a new window context to evaluate the
+  // JavaScript.
+  virtual bool CreateNewContext() = 0;
+
  private:
   bool ready_;
   DistillerPageCallback distiller_page_callback_;