Update MidiDispatcher to use Mojo Permission Service.

content/public/browser/child_process_security_policy.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_PUBLIC_BROWSER_CHILD_PROCESS_SECURITY_POLICY_H_
 #define CONTENT_PUBLIC_BROWSER_CHILD_PROCESS_SECURITY_POLICY_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 132 matching lines @@
                                      const std::string& filesystem_id) = 0;
 
   // Returns true if delete-from access has been granted to |filesystem_id|.
   virtual bool CanDeleteFromFileSystem(int child_id,
                                        const std::string& filesystem_id) = 0;
 
   // Returns true if the specified child_id has been granted WebUI bindings.
   // The browser should check this property before assuming the child process
   // is allowed to use WebUI bindings.
   virtual bool HasWebUIBindings(int child_id) = 0;
+
+  // Grants permission to send system exclusive message to any MIDI devices.
+  virtual void GrantSendMidiSysExMessage(int child_id) = 0;

[Tom Sepez, 2014/11/24 18:10:02]

I'd expected to see a corresponding CanSendMidi...() method?

[mlamouri (slow - plz ping), 2014/11/24 18:20:17]

It's in the _impl.h It seems that ChildProcessSecurityPolicy only has methods
that need to be public and the *Impl has the methods that can stay inside
content/.

I would gladly move CanSendMidiSysExMessage to the public interface if you
prefer.

[Tom Sepez, 2014/11/24 18:27:09]

Ah, OK.  Its OK where it is, I was just surprised not to see it change too.

 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_CHILD_PROCESS_SECURITY_POLICY_H_