Add a notice about other forms of browsing history to the History WebUI.

chrome/browser/ui/webui/browsing_history_handler.h

Index: chrome/browser/ui/webui/browsing_history_handler.h
diff --git a/chrome/browser/ui/webui/browsing_history_handler.h b/chrome/browser/ui/webui/browsing_history_handler.h
index f94ef2fa129bb6676e5f6cec4d699f7991922723..0146c4adb34749ffc62aea2ae6d65ff2d2a7360d 100644
--- a/chrome/browser/ui/webui/browsing_history_handler.h
+++ b/chrome/browser/ui/webui/browsing_history_handler.h
@@ -162,6 +162,11 @@ class BrowsingHistoryHandler : public content::WebUIMessageHandler,
                                history::WebHistoryService::Request* request,
                                const base::DictionaryValue* results_value);
 
+  // Callback telling us whether other forms of browsing history were found
+  // on the history server.
+  void OtherFormsOfBrowsingHistoryQueryComplete(
+      bool found_other_forms_of_browsing_history);
+
   // Callback from the history system when visits were deleted.
   void RemoveComplete();
 
@@ -218,6 +223,12 @@ class BrowsingHistoryHandler : public content::WebUIMessageHandler,
   ScopedObserver<history::HistoryService, history::HistoryServiceObserver>
       history_service_observer_;
 
+  // Whether the last call to Web History returned synced results.
+  bool has_synced_results_;
+
+  // Whether there are other forms of browsing history on the history server.
+  bool has_other_forms_of_browsing_history_;
+
   base::WeakPtrFactory<BrowsingHistoryHandler> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowsingHistoryHandler);