Add new media request result MEDIA_DEVICE_FAILED_DUE_TO_SHUTDOWN.

android_webview/native/aw_web_contents_delegate.cc

Index: android_webview/native/aw_web_contents_delegate.cc
diff --git a/android_webview/native/aw_web_contents_delegate.cc b/android_webview/native/aw_web_contents_delegate.cc
index 7572c39c4107d879087109c2bad7399de7299901..bbf34137ee370b7fd6de7a968f79eb05393d161c 100644
--- a/android_webview/native/aw_web_contents_delegate.cc
+++ b/android_webview/native/aw_web_contents_delegate.cc
@@ -199,7 +199,7 @@ void AwWebContentsDelegate::RequestMediaAccessPermission(
   AwContents* aw_contents = AwContents::FromWebContents(web_contents);
   if (!aw_contents) {
     callback.Run(content::MediaStreamDevices(),
-                 content::MEDIA_DEVICE_INVALID_STATE,
+                 content::MEDIA_DEVICE_FAILED_DUE_TO_SHUTDOWN,
                  scoped_ptr<content::MediaStreamUI>().Pass());
     return;
   }