PlzNavigate: add cancel navigation logic for uncommitted requests

content/browser/frame_host/navigation_request.h

Index: content/browser/frame_host/navigation_request.h
diff --git a/content/browser/frame_host/navigation_request.h b/content/browser/frame_host/navigation_request.h
index d8be70ba1bee21c7df45b73a99e291d60ee8f863..fa3d1516d86082012401d4855b3ef73aed1da3de 100644
--- a/content/browser/frame_host/navigation_request.h
+++ b/content/browser/frame_host/navigation_request.h
@@ -31,10 +31,19 @@ class NavigationRequest {
   // manipulated on the UI thread.
   void BeginNavigation(scoped_refptr<ResourceRequestBody> body);
 
+  int64 navigation_request_id() const {
+    return navigation_request_id_;

[clamy, 2014/08/14 13:19:06]

Please write this on one line since it fits:
int64 navigation_request_id() const { return navigation_request_id_; }

[carlosk, 2014/08/14 17:07:10]

Done.

+  }
+
  private:
+  // The next available browser-global navigation request ID.
+  static int64 next_navigation_request_id_;
+
+  const int64 navigation_request_id_;
   const NavigationRequestInfo info_;
   const int64 frame_node_id_;
 
+

[clamy, 2014/08/14 13:19:06]

nit: unnecessary blank line.

[carlosk, 2014/08/14 17:07:10]

Done.

   DISALLOW_COPY_AND_ASSIGN(NavigationRequest);
 };