Only grant MidiSysExMessage if needed.

It seems that right now we are granting it to child policy process even if the permission was not granted.
Rename the success parameter to is_allowed. To match what the renderer expects.

TBR=tsepez,dalecurtis
BUG=

Review URL: https://codereview.chromium.org/329993002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@276720 0039d316-1c4b-4281-b951-d872f2087c98

content/browser/renderer_host/media/midi_dispatcher_host.cc

@@ -72,10 +72,12 @@ void MidiDispatcherHost::OnCancelSysExPermissionRequest(
 }
 void MidiDispatcherHost::WasSysExPermissionGranted(int render_view_id,
                                                    int bridge_id,
-                                                   bool success) {
-  ChildProcessSecurityPolicyImpl::GetInstance()->GrantSendMidiSysExMessage(
-      render_process_id_);
-  Send(new MidiMsg_SysExPermissionApproved(render_view_id, bridge_id, success));
+                                                   bool is_allowed) {
+  if (is_allowed)
+    ChildProcessSecurityPolicyImpl::GetInstance()->GrantSendMidiSysExMessage(
+        render_process_id_);
+  Send(new MidiMsg_SysExPermissionApproved(
+      render_view_id, bridge_id, is_allowed));
 }
 
 }  // namespace content

content/browser/renderer_host/media/midi_dispatcher_host.h

@@ -38,7 +38,7 @@ class MidiDispatcherHost : public BrowserMessageFilter {
                                       const GURL& requesting_frame);
   void WasSysExPermissionGranted(int render_view_id,
                                  int bridge_id,
-                                 bool success);
+                                 bool is_allowed);
 
   int render_process_id_;
   BrowserContext* browser_context_;

content/common/media/midi_messages.h

@@ -45,7 +45,7 @@ IPC_MESSAGE_CONTROL3(MidiHostMsg_CancelSysExPermissionRequest,
 
 IPC_MESSAGE_ROUTED2(MidiMsg_SysExPermissionApproved,
                     int /* client id */,
-                    bool /* success */)
+                    bool /* is_allowed */)
 
 // Messages for IPC between MidiMessageFilter and MidiHost.