added the allowcertificateerror method to the headless browser client so that it can handle certifi…

headless/lib/browser/headless_content_browser_client.cc

Index: headless/lib/browser/headless_content_browser_client.cc
diff --git a/headless/lib/browser/headless_content_browser_client.cc b/headless/lib/browser/headless_content_browser_client.cc
index 1e19a500f82c4fb788deca19dc9d65e5399e3162..56e09a6de53c91f3036a2c39a5d5042b1c2eeab3 100644
--- a/headless/lib/browser/headless_content_browser_client.cc
+++ b/headless/lib/browser/headless_content_browser_client.cc
@@ -204,6 +204,21 @@ void HeadlessContentBrowserClient::AppendExtraCommandLineSwitches(
 #endif  // defined(HEADLESS_USE_BREAKPAD)
 }
 
+void HeadlessContentBrowserClient::AllowCertificateError(
+    content::WebContents* web_contents,
+    int cert_error,
+    const net::SSLInfo& ssl_info,
+    const GURL& request_url,
+    content::ResourceType resource_type,
+    bool overridable,
+    bool strict_enforcement,
+    bool expired_previous_decision,
+    const base::Callback<void(content::CertificateRequestResultType)>&
+        callback) {
+  if (!callback.is_null())
+    callback.Run(content::CERTIFICATE_REQUEST_RESULT_TYPE_DENY);
+}
+
 void HeadlessContentBrowserClient::ResourceDispatcherHostCreated() {
   resource_dispatcher_host_delegate_.reset(
       new HeadlessResourceDispatcherHostDelegate);