Cancel MIDI permission request infobar on MIDIAccess stop.

android_webview/browser/aw_browser_context.cc

Index: android_webview/browser/aw_browser_context.cc
diff --git a/android_webview/browser/aw_browser_context.cc b/android_webview/browser/aw_browser_context.cc
index 7adc6dd97c3a285cdbfc99cb7b83d2f196e3966e..ca3a5b8aefd52a319a0e9dd3b5adeec3836d80d9 100644
--- a/android_webview/browser/aw_browser_context.cc
+++ b/android_webview/browser/aw_browser_context.cc
@@ -247,12 +247,20 @@ net::URLRequestContextGetter* AwBrowserContext::GetMediaRequestContext() {
 void AwBrowserContext::RequestMIDISysExPermission(
       int render_process_id,
       int render_view_id,
+      int bridge_id,
       const GURL& requesting_frame,
       const MIDISysExPermissionCallback& callback) {
   // TODO(toyoshim): Android is not supported yet.
   callback.Run(false);
 }
 
+void AwBrowserContext::CancelMIDISysExPermissionRequest(
+    int render_process_id,
+    int render_view_id,
+    int bridge_id,
+    const GURL& requesting_frame) {
+}
+
 net::URLRequestContextGetter*
 AwBrowserContext::GetMediaRequestContextForRenderProcess(
     int renderer_child_id) {