[fsp] Wire limiting number of opened files to FSP API.

chrome/browser/chromeos/file_system_provider/throttled_file_system_unittest.cc

 // Copyright 2015 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/file_system_provider/throttled_file_system.h"
 
 #include <vector>
 
 #include "base/files/file.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 32 matching lines @@
  protected:
   FileSystemProviderThrottledFileSystemTest() {}
   virtual ~FileSystemProviderThrottledFileSystemTest() {}
 
   virtual void SetUp() override {}
 
   // Initializes the throttled file system with |limit| number of opened files
   // at once. If 0, then no limit.
   void SetUpFileSystem(size_t limit) {
     MountOptions options(kFileSystemId, kDisplayName);
-    if (limit)
-      options.opened_files_limit = limit;
+    options.opened_files_limit = limit;
 
     ProvidedFileSystemInfo file_system_info(kExtensionId, options,
                                             base::FilePath() /* mount_path */);
 
     file_system_.reset(new ThrottledFileSystem(
         make_scoped_ptr(new FakeProvidedFileSystem(file_system_info))));
   }
 
   content::TestBrowserThreadBundle thread_bundle_;
   scoped_ptr<ThrottledFileSystem> file_system_;
@@ skipping 103 matching lines @@
   ASSERT_EQ(1u, abort_log.size());
   EXPECT_EQ(base::File::FILE_ERROR_INVALID_OPERATION, abort_log[0]);
 
   // Confirm, that the second task is not executed after a invalid abort of the
   // first one.
   EXPECT_EQ(1u, first_open_log.size());
   EXPECT_EQ(0u, second_open_log.size());
 }
 }  // namespace file_system_provider
 }  // namespace chromeos