Convert MIDI permission requests to use WebContents in preparation for switching the code to using …

content/public/browser/content_browser_client.cc

Index: content/public/browser/content_browser_client.cc
diff --git a/content/public/browser/content_browser_client.cc b/content/public/browser/content_browser_client.cc
index 58beabc6091f31c5e477c0b6d00e50667f7a1f31..7bfa091bc56949279d69cf61c08b8c7ad35fe780 100644
--- a/content/public/browser/content_browser_client.cc
+++ b/content/public/browser/content_browser_client.cc
@@ -221,6 +221,16 @@ void ContentBrowserClient::RequestGeolocationPermission(
   result_callback.Run(true);
 }
 
+void ContentBrowserClient::RequestMidiSysExPermission(
+    WebContents* web_contents,
+    int bridge_id,
+    const GURL& requesting_frame,
+    bool user_gesture,
+    base::Callback<void(bool)> result_callback,
+    base::Closure* cancel_callback) {
+  result_callback.Run(true);
+}
+
 bool ContentBrowserClient::CanCreateWindow(
     const GURL& opener_url,
     const GURL& opener_top_level_frame_url,