Remove implicit conversions from scoped_refptr to T* in ppapi/

ppapi/proxy/truetype_font_resource.cc

 // Copyright (c) 2013 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/proxy/truetype_font_resource.h"
 
 #include "base/bind.h"
 #include "ipc/ipc_message.h"
 #include "ppapi/c/pp_errors.h"
 #include "ppapi/proxy/ppapi_messages.h"
@@ skipping 27 matching lines @@
 TrueTypeFontResource::~TrueTypeFontResource() {
 }
 
 PPB_TrueTypeFont_API* TrueTypeFontResource::AsPPB_TrueTypeFont_API() {
   return this;
 }
 
 int32_t TrueTypeFontResource::Describe(
     PP_TrueTypeFontDesc_Dev* desc,
     scoped_refptr<TrackedCallback> callback) {
-  if (describe_callback_)
+  if (describe_callback_.get())
     return PP_ERROR_INPROGRESS;
 
   if (create_result_ == PP_OK) {
     desc_.CopyToPPTrueTypeFontDesc(desc);
   } else if (create_result_ == PP_OK_COMPLETIONPENDING) {
     describe_desc_ = desc;
     describe_callback_ = callback;
   }
 
   return create_result_;
@@ skipping 96 matching lines @@
   if (output.is_valid())
     output.StoreArray(data.data(), std::max(0, result));
   else
     result = PP_ERROR_FAILED;
 
   callback->Run(result);
 }
 
 }  // namespace proxy
 }  // namespace ppapi