Cancel MIDI permission request infobar on MIDIAccess stop.

content/public/test/test_browser_context.cc

Index: content/public/test/test_browser_context.cc
diff --git a/content/public/test/test_browser_context.cc b/content/public/test/test_browser_context.cc
index 907f748323d33a3fa4d16b3cf09533d5081e7db5..f194e7e64368923cc0cb3260888f3f3782ec3e62 100644
--- a/content/public/test/test_browser_context.cc
+++ b/content/public/test/test_browser_context.cc
@@ -101,12 +101,20 @@ TestBrowserContext::GetMediaRequestContextForStoragePartition(
 void TestBrowserContext::RequestMIDISysExPermission(
       int render_process_id,
       int render_view_id,
+      int bridge_id,
       const GURL& requesting_frame,
       const MIDISysExPermissionCallback& callback) {
   // Always reject requests for testing.
   callback.Run(false);
 }
 
+void TestBrowserContext::CancelMIDISysExPermissionRequest(
+    int render_process_id,
+    int render_view_id,
+    int bridge_id,
+    const GURL& requesting_frame) {
+}
+
 ResourceContext* TestBrowserContext::GetResourceContext() {
   if (!resource_context_)
     resource_context_.reset(new MockResourceContext(