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

content/public/browser/browser_context.h

Index: content/public/browser/browser_context.h
diff --git a/content/public/browser/browser_context.h b/content/public/browser/browser_context.h
index 984f6efd4b9c150b086cfa12ed9612c62fe65f2c..24ea22dd688e462ba897545f34f09d323fbab982 100644
--- a/content/public/browser/browser_context.h
+++ b/content/public/browser/browser_context.h
@@ -131,25 +131,6 @@ class CONTENT_EXPORT BrowserContext : public base::SupportsUserData {
           const base::FilePath& partition_path,
           bool in_memory) = 0;
 
-  typedef base::Callback<void(bool)> MidiSysExPermissionCallback;
-
-  // Requests a permission to use system exclusive messages in MIDI events.
-  // |callback| will be invoked when the request is resolved.
-  virtual void RequestMidiSysExPermission(
-      int render_process_id,
-      int render_view_id,
-      int bridge_id,
-      const GURL& requesting_frame,
-      bool user_gesture,
-      const MidiSysExPermissionCallback& callback) = 0;
-
-  // Cancels a pending MIDI permission request.
-  virtual void CancelMidiSysExPermissionRequest(
-      int render_process_id,
-      int render_view_id,
-      int bridge_id,
-      const GURL& requesting_frame) = 0;
-
   typedef base::Callback<void(bool)> ProtectedMediaIdentifierPermissionCallback;
 
   // Request permission to access protected media identifier. The callback will