Add certificate error handling to devtools.

content/browser/web_contents/web_contents_impl.cc

Index: content/browser/web_contents/web_contents_impl.cc
diff --git a/content/browser/web_contents/web_contents_impl.cc b/content/browser/web_contents/web_contents_impl.cc
index 9bbc2e84720ce30fa6b8a34a3f7cf8adc22c6a92..3b20abc22a8eafaf13123a1836b11bd7c8a506ab 100644
--- a/content/browser/web_contents/web_contents_impl.cc
+++ b/content/browser/web_contents/web_contents_impl.cc
@@ -1465,6 +1465,15 @@ void WebContentsImpl::DidChangeVisibleSecurityState() {
   }
 }
 
+bool WebContentsImpl::NotifyCertificateError(
+    base::Callback<void(content::CertificateRequestResultType)> callback) {
+  bool handled = false;
+  for (auto& observer : observers_)
+    if (observer.NotifyCertificateError(callback))
+      handled = true;

[Eric Seckler, 2017/01/19 11:42:28]

I think we have to break the loop in this case - otherwise, we could end up with
two observers that want to handle the error / issue the callback.

[irisu, 2017/02/07 23:30:19]

Done.

+  return handled;
+}
+
 void WebContentsImpl::Stop() {
   for (FrameTreeNode* node : frame_tree_.Nodes())
     node->StopLoading();