Update NavigationHandleImpl#GetResponseHeaders method.

content/browser/frame_host/navigation_handle_impl.cc

Index: content/browser/frame_host/navigation_handle_impl.cc
diff --git a/content/browser/frame_host/navigation_handle_impl.cc b/content/browser/frame_host/navigation_handle_impl.cc
index 7cec5bf579bf362f9775f87bbadcb8483579a38b..ffb3dc4d2d382ba43720770e83467c9b30f258be 100644
--- a/content/browser/frame_host/navigation_handle_impl.cc
+++ b/content/browser/frame_host/navigation_handle_impl.cc
@@ -132,6 +132,10 @@ bool NavigationHandleImpl::IsSamePage() {
   return is_same_page_;
 }
 
+bool NavigationHandleImpl::HasResponseHeaders() const {
+  return state_ >= WILL_REDIRECT_REQUEST && response_headers_.get();

[clamy, 2016/02/09 10:42:40]

nit: the state_ >= WILL_REDIRECT_REQUEST is not really useful here since
response_headers_ should always be null before we reach that state.

[Donn Denman, 2016/02/10 01:05:05]

Done.

+}
+
 const net::HttpResponseHeaders* NavigationHandleImpl::GetResponseHeaders() {
   DCHECK(state_ >= WILL_REDIRECT_REQUEST)
       << "This accessor should only be called when the request encountered a "