[chromedriver] Fallback to devtools for screenshotting of forbidden urls.

chrome/test/chromedriver/chrome/status.cc

Index: chrome/test/chromedriver/chrome/status.cc
diff --git a/chrome/test/chromedriver/chrome/status.cc b/chrome/test/chromedriver/chrome/status.cc
index dd986944f7f8e12c09d75200eb27ac6e88eea0e7..df5e6b062a1a247f86fdf4b54a3e8e64efeb93a6 100644
--- a/chrome/test/chromedriver/chrome/status.cc
+++ b/chrome/test/chromedriver/chrome/status.cc
@@ -55,6 +55,8 @@ const char* DefaultMessageForStatusCode(StatusCode code) {
       return "chrome not reachable";
     case kDisconnected:
       return "disconnected";
+    case kForbidden:
+      return "forbidden";
     default:
       return "<unknown>";
   }