Convert ppapi/shared to use TrackedCallback.

ppapi/shared_impl/ppb_file_io_shared.cc

Index: ppapi/shared_impl/ppb_file_io_shared.cc
diff --git a/ppapi/shared_impl/ppb_file_io_shared.cc b/ppapi/shared_impl/ppb_file_io_shared.cc
index dcad4d70caa44dbc94005d56dd6728a77af7252b..b3eefbc493ba7d84c920b3363462838aa7442d46 100644
--- a/ppapi/shared_impl/ppb_file_io_shared.cc
+++ b/ppapi/shared_impl/ppb_file_io_shared.cc
@@ -24,8 +24,6 @@ using thunk::PPB_FileRef_API;
 PPB_FileIO_Shared::CallbackEntry::CallbackEntry()
     : read_buffer(NULL),
       info(NULL) {
-  callback.func = NULL;
-  callback.user_data = NULL;
 }
 
 PPB_FileIO_Shared::CallbackEntry::CallbackEntry(const CallbackEntry& entry)
@@ -59,11 +57,8 @@ PPB_FileIO_Shared::~PPB_FileIO_Shared() {
 void PPB_FileIO_Shared::LastPluginRefWasDeleted() {
   // Abort all pending callbacks. Do this by posting a task to avoid reentering
   // the plugin's Release() call that probably deleted this object.
-  for (size_t i = 0; i < callbacks_.size(); i++) {
-    MessageLoop::current()->PostTask(FROM_HERE, base::Bind(
-        callbacks_[i].callback.func, callbacks_[i].callback.user_data,
-        static_cast<int32_t>(PP_ERROR_ABORTED)));
-  }
+  for (size_t i = 0; i < callbacks_.size(); i++)

[viettrungluu, 2012/01/03 22:43:46]

I suppose you could also use PostAbortForResource()? (Slightly slower, but
slightly cleaner?)

[brettw, 2012/01/04 00:27:29]

Actually I can just delete this code, it's already done by the resource tracker.

+    callbacks_[i].callback->PostAbort();
   callbacks_.erase(callbacks_.begin(), callbacks_.end());
 }
 
@@ -217,7 +212,7 @@ void PPB_FileIO_Shared::RegisterCallback(OperationType op,
          (pending_op_ != OPERATION_EXCLUSIVE && pending_op_ == op));
 
   CallbackEntry entry;
-  entry.callback = callback;
+  entry.callback = new TrackedCallback(this, callback);
   entry.read_buffer = read_buffer;
   entry.info = info;
   callbacks_.push_back(entry);
@@ -233,7 +228,7 @@ void PPB_FileIO_Shared::RunAndRemoveFirstPendingCallback(int32_t result) {
   if (callbacks_.empty())
     pending_op_ = OPERATION_NONE;
 
-  PP_RunCompletionCallback(&front.callback, result);
+  front.callback->Run(result);
 }
 
 }  // namespace ppapi