Remove implicit conversions from scoped_refptr to T* in extensions code.

chrome/browser/chromeos/extensions/file_manager/private_api_file_system.cc

 // Copyright 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 "chrome/browser/chromeos/extensions/file_manager/private_api_file_system.h"
 
 #include <sys/statvfs.h>
 
 #include "base/posix/eintr_wrapper.h"
 #include "base/strings/string_number_conversions.h"
@@ skipping 602 matching lines @@
 
 bool FileManagerPrivateInternalResolveIsolatedEntriesFunction::RunAsync() {
   using extensions::api::file_manager_private_internal::ResolveIsolatedEntries::
       Params;
   const scoped_ptr<Params> params(Params::Create(*args_));
   EXTENSION_FUNCTION_VALIDATE(params);
 
   scoped_refptr<storage::FileSystemContext> file_system_context =
       file_manager::util::GetFileSystemContextForRenderViewHost(
           GetProfile(), render_view_host());
-  DCHECK(file_system_context);
+  DCHECK(file_system_context.get());
 
   const storage::ExternalFileSystemBackend* external_backend =
       file_system_context->external_backend();
   DCHECK(external_backend);
 
   file_manager::util::FileDefinitionList file_definition_list;
   for (size_t i = 0; i < params->urls.size(); ++i) {
     FileSystemURL fileSystemUrl =
         file_system_context->CrackURL(GURL(params->urls[i]));
     DCHECK(external_backend->CanHandleType(fileSystemUrl.type()));
@@ skipping 39 matching lines @@
         "/" + entry_definition_list->at(i).full_path.AsUTF8Unsafe();
     entry->file_is_directory = entry_definition_list->at(i).is_directory;
     entries.push_back(entry);
   }
 
   results_ = extensions::api::file_manager_private_internal::
       ResolveIsolatedEntries::Results::Create(entries);
   SendResponse(true);
 }
 }  // namespace extensions