Use the new callback tracker and delete the old one

webkit/plugins/ppapi/ppb_file_chooser_impl.cc

Index: webkit/plugins/ppapi/ppb_file_chooser_impl.cc
diff --git a/webkit/plugins/ppapi/ppb_file_chooser_impl.cc b/webkit/plugins/ppapi/ppb_file_chooser_impl.cc
index 1a5167bd9ce97c9e395931c8c142b439500b303d..e08b4d4bddc29d2286576add658d62efbe80153d 100644
--- a/webkit/plugins/ppapi/ppb_file_chooser_impl.cc
+++ b/webkit/plugins/ppapi/ppb_file_chooser_impl.cc
@@ -13,6 +13,7 @@
 #include "base/sys_string_conversions.h"
 #include "ppapi/c/pp_completion_callback.h"
 #include "ppapi/c/pp_errors.h"
+#include "ppapi/shared_impl/tracked_callback.h"
 #include "ppapi/shared_impl/var.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebCString.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebFileChooserCompletion.h"
@@ -20,7 +21,6 @@
 #include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebString.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebVector.h"
 #include "webkit/glue/webkit_glue.h"
-#include "webkit/plugins/ppapi/callbacks.h"
 #include "webkit/plugins/ppapi/common.h"
 #include "webkit/plugins/ppapi/ppb_file_ref_impl.h"
 #include "webkit/plugins/ppapi/plugin_delegate.h"
@@ -30,6 +30,7 @@
 
 using ppapi::StringVar;
 using ppapi::thunk::PPB_FileChooser_API;
+using ppapi::TrackedCallback;
 using WebKit::WebCString;
 using WebKit::WebFileChooserCompletion;
 using WebKit::WebFileChooserParams;
@@ -138,14 +139,11 @@ void PPB_FileChooser_Impl::RegisterCallback(
   if (!plugin_module)
     return;
 
-  callback_ = new TrackedCompletionCallback(plugin_module->GetCallbackTracker(),
-                                            pp_resource(), callback);
+  callback_ = new TrackedCallback(this, callback);
 }
 
 void PPB_FileChooser_Impl::RunCallback(int32_t result) {
-  scoped_refptr<TrackedCompletionCallback> callback;
-  callback.swap(callback_);
-  callback->Run(result);  // Will complete abortively if necessary.
+  TrackedCallback::ClearAndRun(&callback_, result);
 }
 
 int32_t PPB_FileChooser_Impl::Show(const PP_CompletionCallback& callback) {