Update Linux to use scoped_refptr<T>::get() rather than implicit "operator T*"

webkit/browser/fileapi/async_file_test_helper.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 "base/bind.h"
 #include "base/run_loop.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "webkit/browser/fileapi/async_file_test_helper.h"
 #include "webkit/browser/fileapi/file_system_context.h"
 #include "webkit/browser/fileapi/file_system_mount_point_provider.h"
@@ skipping 33 matching lines @@
 }
 
 void CreateSnapshotFileCallback(
     base::RunLoop* run_loop,
     base::PlatformFileError* result_out,
     base::FilePath* platform_path_out,
     base::PlatformFileError result,
     const base::PlatformFileInfo& file_info,
     const base::FilePath& platform_path,
     const scoped_refptr<webkit_blob::ShareableFileReference>& file_ref) {
-  DCHECK(!file_ref);
+  DCHECK(!file_ref.get());
   *result_out = result;
   if (platform_path_out)
     *platform_path_out = platform_path;
   run_loop->Quit();
 }
 
 void ReadDirectoryCallback(base::RunLoop* run_loop,
                            base::PlatformFileError* result_out,
                            FileEntryList* entries_out,
                            base::PlatformFileError result,
@@ skipping 165 matching lines @@
   quota::QuotaStatusCode status = quota::kQuotaStatusUnknown;
   quota_manager->GetUsageAndQuota(
       origin,
       FileSystemTypeToQuotaStorageType(type),
       base::Bind(&DidGetUsageAndQuota, &status, usage, quota));
   base::MessageLoop::current()->RunUntilIdle();
   return status;
 }
 
 }  // namespace fileapi