Remove implicit conversions from scoped_refptr to T* in ppapi/

ppapi/shared_impl/tracked_callback.cc

 // Copyright (c) 2012 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.
 
 #include "ppapi/shared_impl/tracked_callback.h"
 
 #include "base/bind.h"
 #include "base/compiler_specific.h"
 #include "base/logging.h"
 #include "base/message_loop/message_loop.h"
@@ skipping 149 matching lines @@
   // should never try to PostRun more than once otherwise.
   DCHECK(result == PP_ERROR_ABORTED || !is_scheduled_);
 
   if (is_blocking()) {
     // We might not have a MessageLoop to post to, so we must call Run()
     // directly.
     Run(result);
   } else {
     base::Closure callback_closure(
         RunWhileLocked(base::Bind(&TrackedCallback::Run, this, result)));
-    if (target_loop_) {
+    if (target_loop_.get()) {
       target_loop_->PostClosure(FROM_HERE, callback_closure, 0);
     } else {
       // We must be running in-process and on the main thread (the Enter
       // classes protect against having a null target_loop_ otherwise).
       DCHECK(IsMainThread());
       DCHECK(PpapiGlobals::Get()->IsHostGlobals());
       base::MessageLoop::current()->PostTask(FROM_HERE, callback_closure);
     }
   }
   is_scheduled_ = true;
@@ skipping 52 matching lines @@
   // until we're done.
   scoped_refptr<TrackedCallback> thiz = this;
   completed_ = true;
   // We may not have a valid resource, in which case we're not in the tracker.
   if (resource_id_)
     tracker_->Remove(thiz);
   tracker_ = NULL;
 }
 
 }  // namespace ppapi