Add the navigation redirect-chain to Sync sessions proto for offline analysis.

content/public/common/page_transition_types.h

Index: content/public/common/page_transition_types.h
diff --git a/content/public/common/page_transition_types.h b/content/public/common/page_transition_types.h
index acb894b4760f90b2bd8128ffb4e3ffc39cf8f02f..1b1f8013502cf1eee3fdf754cbcceb8691829cc9 100644
--- a/content/public/common/page_transition_types.h
+++ b/content/public/common/page_transition_types.h
@@ -38,6 +38,10 @@ CONTENT_EXPORT bool PageTransitionIsMainFrame(PageTransition type);
 // Returns whether a transition involves a redirection
 CONTENT_EXPORT bool PageTransitionIsRedirect(PageTransition type);
 
+// Returns whether a transition is a new navigation (rather than a return
+// to a previously committed navigation).
+CONTENT_EXPORT bool PageTransitionIsNewNavigation(PageTransition type);
+
 // Return the qualifier
 CONTENT_EXPORT int32 PageTransitionGetQualifier(PageTransition type);