Set navigationStart correctly for all load types.

content/renderer/render_frame_impl.h

Index: content/renderer/render_frame_impl.h
diff --git a/content/renderer/render_frame_impl.h b/content/renderer/render_frame_impl.h
index 2ff0dd716f7a2455c55fe998ececc2dabd200182..cbb7025006a8a05b783d34ce7bec7b6fa8bfd486 100644
--- a/content/renderer/render_frame_impl.h
+++ b/content/renderer/render_frame_impl.h
@@ -1108,6 +1108,11 @@ class CONTENT_EXPORT RenderFrameImpl
   // be reported to the browser process via SendUpdateState.
   blink::WebHistoryItem current_history_item_;
 
+  // True if the frame contains the initial document (i.e. has not navigated
+  // yet) and it has been accessed by another page.  Always false after the
+  // first commit.
+  bool did_access_initial_document_;

[nasko, 2016/07/18 22:20:00]

Why can't we just expose the bit that is already kept in blink and check that
instead of introducing another piece of state to keep track of? Especially since
it will be false for the majority of the lifetime of this object.

[Alexander Semashko, 2016/07/19 10:59:07]

Indeed. Done.

+
 #if defined(ENABLE_PLUGINS)
   // Current text input composition text. Empty if no composition is in
   // progress.