Add client cert support to android_webview

android_webview/browser/aw_content_browser_client.cc

Index: android_webview/browser/aw_content_browser_client.cc
diff --git a/android_webview/browser/aw_content_browser_client.cc b/android_webview/browser/aw_content_browser_client.cc
index b1edcfdea5dea49320a7da258fe3d152d0f4917b..543441a0e0a6e127fa62d023e571d6d3e1698245 100644
--- a/android_webview/browser/aw_content_browser_client.cc
+++ b/android_webview/browser/aw_content_browser_client.cc
@@ -359,10 +359,13 @@ void AwContentBrowserClient::SelectClientCertificate(
       const net::HttpNetworkSession* network_session,
       net::SSLCertRequestInfo* cert_request_info,
       const base::Callback<void(net::X509Certificate*)>& callback) {
-  LOG(WARNING) << "Client certificate request from "
-        << cert_request_info->host_and_port.ToString()
-        << " rejected. (Client certificates not supported in WebView)";
-  callback.Run(NULL);
+  AwContentsClientBridgeBase* client =
+      AwContentsClientBridgeBase::FromID(render_process_id, render_frame_id);
+  if (client) {
+    client->SelectClientCertificate(cert_request_info, callback);
+  } else {
+    callback.Run(NULL);
+  }
 }
 
 blink::WebNotificationPresenter::Permission