[Media] Add user gesture reporting for API calls to midi and media streams.

content/common/media/midi_messages.h

 // Copyright (c) 2013 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.
 
 // IPC messages for access to MIDI hardware.
 // Multiply-included message file, hence no include guard.
 
 #include "base/basictypes.h"
 #include "content/common/content_export.h"
 #include "ipc/ipc_message_macros.h"
 #include "media/midi/midi_port_info.h"
 #include "url/gurl.h"
 
 #undef IPC_MESSAGE_EXPORT
 #define IPC_MESSAGE_EXPORT CONTENT_EXPORT
 #define IPC_MESSAGE_START MidiMsgStart
 
 IPC_STRUCT_TRAITS_BEGIN(media::MidiPortInfo)
   IPC_STRUCT_TRAITS_MEMBER(id)
   IPC_STRUCT_TRAITS_MEMBER(manufacturer)
   IPC_STRUCT_TRAITS_MEMBER(name)
   IPC_STRUCT_TRAITS_MEMBER(version)
 IPC_STRUCT_TRAITS_END()
 
 // Messages for IPC between MidiDispatcher and MidiDispatcherHost.
 
 // Renderer request to browser for using system exclusive messages.
-IPC_MESSAGE_CONTROL3(MidiHostMsg_RequestSysExPermission,
+IPC_MESSAGE_CONTROL4(MidiHostMsg_RequestSysExPermission,
                      int /* routing id */,
                      int /* client id */,
-                     GURL /* origin */)
+                     GURL /* origin */,
+                     bool /* user_gesture */)
 
 // Renderer request to browser for canceling a previous permission request.
 IPC_MESSAGE_CONTROL3(MidiHostMsg_CancelSysExPermissionRequest,
                      int /* render_view_id */,
                      int /* bridge_id */,
                      GURL /* GURL of the frame */)
 
 // Messages sent from the browser to the renderer.
 
 IPC_MESSAGE_ROUTED2(MidiMsg_SysExPermissionApproved,
@@ skipping 19 matching lines @@
                      media::MidiPortInfoList /* input ports */,
                      media::MidiPortInfoList /* output ports */)
 
 IPC_MESSAGE_CONTROL3(MidiMsg_DataReceived,
                      uint32 /* port */,
                      std::vector<uint8> /* data */,
                      double /* timestamp */)
 
 IPC_MESSAGE_CONTROL1(MidiMsg_AcknowledgeSentData,
                      uint32 /* bytes sent */)