Web MIDI: add RequestMIDISysExPermission to BrowserContext

content/shell/shell_browser_context.cc

Index: content/shell/shell_browser_context.cc
diff --git a/content/shell/shell_browser_context.cc b/content/shell/shell_browser_context.cc
index 721d7c88210d7fa46c57022095f01dad747f356d..b5fc9bc37be04d363c1e89f70f358aea1abeea78 100644
--- a/content/shell/shell_browser_context.cc
+++ b/content/shell/shell_browser_context.cc
@@ -170,6 +170,16 @@ net::URLRequestContextGetter*
   return GetRequestContext();
 }
 
+void ShellBrowserContext::RequestMIDISysExPermission(
+      int render_process_id,
+      int render_view_id,
+      int client_id,
+      const GURL& requesting_frame,
+      const MIDISysExPermissionCallback& callback) {
+  // Always reject requests for testing.
+  callback.Run(render_process_id, render_view_id, client_id, false);
+}
+
 net::URLRequestContextGetter*
     ShellBrowserContext::CreateRequestContextForStoragePartition(
         const base::FilePath& partition_path,