Build supported media targets on iOS.

media/base/media_ios.cc

-// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Copyright 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 "media/base/media.h"
+
 #include "base/logging.h"
 
+// The media library is not used on iOS.  Simple stubs to allow for compilation
+// without !defined(OS_IOS) blocks.
+
 namespace media {
 
 bool InitializeMediaLibrary(const FilePath& module_dir) {
-  // Android doesn't require any additional media libraries.
   return true;
 }
 
-void InitializeMediaLibraryForTesting() {}
+void InitializeMediaLibraryForTesting() {
+}
 
 bool IsMediaLibraryInitialized() {
   return true;
 }
 
 }  // namespace media