Corresponding change in Pepper since EnumerateDevices contract is changed.

ppapi/shared_impl/ppb_audio_input_shared.cc

Index: ppapi/shared_impl/ppb_audio_input_shared.cc
===================================================================
--- ppapi/shared_impl/ppb_audio_input_shared.cc	(revision 148913)
+++ ppapi/shared_impl/ppb_audio_input_shared.cc	(working copy)
@@ -62,6 +62,12 @@
   return InternalEnumerateDevices(devices, callback);
 }
 
+int32_t PPB_AudioInput_Shared::StopEnumerateDevices(PP_Resource* devices) {
+  devices_ = NULL;
+  enumerate_devices_callback_ = NULL;
+  return InternalStopEnumerateDevices(devices);
+}
+
 int32_t PPB_AudioInput_Shared::Open(
     const std::string& device_id,
     PP_Resource config,
@@ -138,9 +144,8 @@
     *devices_ = PPB_DeviceRef_Shared::CreateResourceArray(
         resource_object_type_, pp_instance(), devices);
   }
-  devices_ = NULL;
 
-  TrackedCallback::ClearAndRun(&enumerate_devices_callback_, result);
+  enumerate_devices_callback_->Run(result);

[viettrungluu, 2012/08/02 02:36:14]

You can't use a completion callback any more. Completion callbacks are, by
definition, always run *exactly* once.

You have to define a version of the Pepper APIs, and support the old version,
providing exact (including semantic) backwards compatibility.

(So, for the implementation of the old version, in OnEnumerateDevicesComplete(),
you would still ClearAndRun(), but you would also need to stop enumeration ...
being careful to avoid/handle races.)

 }
 
 void PPB_AudioInput_Shared::OnOpenComplete(