Add the scheme chrome-distiller:// and hook up data source.

content/public/browser/content_browser_client.h

Index: content/public/browser/content_browser_client.h
diff --git a/content/public/browser/content_browser_client.h b/content/public/browser/content_browser_client.h
index 0e2e2a36c730460957c816ade9a7697ea679f939..6202e5678acc09526861ac11c7a475f01d0daf83 100644
--- a/content/public/browser/content_browser_client.h
+++ b/content/public/browser/content_browser_client.h
@@ -189,6 +189,11 @@ class CONTENT_EXPORT ContentBrowserClient {
   virtual void GetAdditionalWebUISchemes(
       std::vector<std::string>* additional_schemes) {}
 
+  // Returns a list of additional schemes where view-source should be allowed,
+  // if any.
+  virtual void GetAdditionalSchemesForViewSource(
+      std::vector<std::string>* additional_schemes) {}
+
   // Creates the main net::URLRequestContextGetter. Should only be called once
   // per ContentBrowserClient object.
   // TODO(ajwong): Remove once http://crbug.com/159193 is resolved.