Pass implementation object to supplemental classes by reference

Source/modules/filesystem/HTMLInputElementFileSystem.cpp

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 25 matching lines @@
 #include "modules/filesystem/DOMFilePath.h"
 #include "modules/filesystem/DOMFileSystem.h"
 #include "modules/filesystem/DirectoryEntry.h"
 #include "modules/filesystem/Entry.h"
 #include "modules/filesystem/FileEntry.h"
 #include "platform/FileMetadata.h"
 
 namespace WebCore {
 
 // static
-EntryVector HTMLInputElementFileSystem::webkitEntries(ExecutionContext* executionContext, HTMLInputElement* input)
+EntryVector HTMLInputElementFileSystem::webkitEntries(ExecutionContext* executionContext, HTMLInputElement& input)
 {
     EntryVector entries;
-    FileList* files = input->files();
+    FileList* files = input.files();
 
     if (!files)
         return entries;
 
-    RefPtr<DOMFileSystem> filesystem = DOMFileSystem::createIsolatedFileSystem(executionContext, input->droppedFileSystemId());
+    RefPtr<DOMFileSystem> filesystem = DOMFileSystem::createIsolatedFileSystem(executionContext, input.droppedFileSystemId());
     if (!filesystem) {
         // Drag-drop isolated filesystem is not available.
         return entries;
     }
 
     for (unsigned i = 0; i < files->length(); ++i) {
         File* file = files->item(i);
 
         // FIXME: This involves synchronous file operation.
         FileMetadata metadata;
@@ skipping 12 matching lines @@
 
 HTMLInputElementFileSystem::HTMLInputElementFileSystem()
 {
 }
 
 HTMLInputElementFileSystem::~HTMLInputElementFileSystem()
 {
 }
 
 } // namespace WebCore