Add certificate error handling to devtools.

content/public/browser/web_contents.cc

Index: content/public/browser/web_contents.cc
diff --git a/content/public/browser/web_contents.cc b/content/public/browser/web_contents.cc
index fa0afb545df985e11e8be9964e843e199d298675..1140195eb4ece80b395b21a7c5ba8897081b9db0 100644
--- a/content/public/browser/web_contents.cc
+++ b/content/public/browser/web_contents.cc
@@ -37,4 +37,10 @@ WebContents::CreateParams::CreateParams(const CreateParams& other) = default;
 WebContents::CreateParams::~CreateParams() {
 }
 
+bool WebContents::NotifyCertificateError(int cert_error,
+                                         const GURL& request_url,
+                                         CertErrorCallback handler) {
+  return false;
+}
+
 }  // namespace content