Add an infrastructure to query history.google.com about other forms of browsing history.

components/history/core/browser/web_history_service.h

Index: components/history/core/browser/web_history_service.h
diff --git a/components/history/core/browser/web_history_service.h b/components/history/core/browser/web_history_service.h
index 2ce04b15795a13d978adbe3bae40e18fba0a4419..523dbf67d81c8ec521b3a4f94b2f03bf8e87dcb5 100644
--- a/components/history/core/browser/web_history_service.h
+++ b/components/history/core/browser/web_history_service.h
@@ -114,6 +114,9 @@ class WebHistoryService : public KeyedService {
   // Used for tests.
   size_t GetNumberOfPendingAudioHistoryRequests();
 
+  // Whether there are other forms of browsing history stored on the server.
+  bool HasOtherFormsOfBrowsingHistory() const;
+
  protected:
   // This function is pulled out for testing purposes. Caller takes ownership of
   // the new Request.