[dom_distiller] Add support for incremental viewer.

components/dom_distiller/core/distiller.cc

Index: components/dom_distiller/core/distiller.cc
diff --git a/components/dom_distiller/core/distiller.cc b/components/dom_distiller/core/distiller.cc
index d720a5be6bb8750a80f7ed9fb433f6f6fd8f59bc..cecf9098b3af992863f942e23bcf5865f819561e 100644
--- a/components/dom_distiller/core/distiller.cc
+++ b/components/dom_distiller/core/distiller.cc
@@ -141,8 +141,7 @@ void DistillerImpl::OnPageDistillationFinished(
     page_data->distilled_page_proto =
         new base::RefCountedData<DistilledPageProto>();
     page_data->page_num = page_num;
-    page_data->title = distilled_page->title;
-
+    page_data->distilled_page_proto->data.set_title(distilled_page->title);
     page_data->distilled_page_proto->data.set_url(page_url.spec());
     page_data->distilled_page_proto->data.set_html(distilled_page->html);
 
@@ -267,7 +266,7 @@ void DistillerImpl::RunDistillerCallbackIfDone() {
       *(article_proto->add_pages()) = page_data->distilled_page_proto->data;
 
       if (first_page) {
-        article_proto->set_title(page_data->title);
+        article_proto->set_title(page_data->distilled_page_proto->data.title());
         first_page = false;
       }