Revert "Keep a copy of page id in RenderViewHost."

content/renderer/render_view_impl.h

Index: content/renderer/render_view_impl.h
diff --git a/content/renderer/render_view_impl.h b/content/renderer/render_view_impl.h
index a766328a9e53d929d51bb210e7337032888b4123..cd6ba6d20974bdb7d985891afed5a6a1e03bffe9 100644
--- a/content/renderer/render_view_impl.h
+++ b/content/renderer/render_view_impl.h
@@ -917,11 +917,6 @@ class CONTENT_EXPORT RenderViewImpl
   // See documentation in RenderView.
   int32 page_id_;
 
-  // TEMPORARY <http://crbug.com/407376>. If true, then |page_id_| has been
-  // changed but not yet reported to the browser process. No IPCs should be sent
-  // with a page_id_ while this is true.
-  bool page_id_not_yet_reported_;
-
   // Indicates the ID of the last page that we sent a FrameNavigate to the
   // browser for. This is used to determine if the most recent transition
   // generated a history entry (less than page_id_), or not (equal to or