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 01a810115cad34d45f09f089116e46209c11b174..ae7b8b1c8b537c3fa47b91c1ba81d958f8c93b3e 100644
--- a/content/browser/web_contents/web_contents_impl.cc
+++ b/content/browser/web_contents/web_contents_impl.cc
@@ -1467,6 +1467,17 @@ 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;
+      break;
+    }
+  return handled;
+}
+
 void WebContentsImpl::Stop() {
   for (FrameTreeNode* node : frame_tree_.Nodes())
     node->StopLoading();