replace NULL->nullptr in src/remoting.

remoting/host/clipboard_win.cc

 // Copyright (c) 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 "remoting/host/clipboard.h"
 
 #include <windows.h>
 
 #include "base/basictypes.h"
 #include "base/bind.h"
@@ skipping 70 matching lines @@
     // The caller must not close the handle that ::SetClipboardData returns.
     ::SetClipboardData(uFormat, hMem);
   }
 
   // The caller must not free the handle. The caller should lock the handle,
   // copy the clipboard data, and unlock the handle. All this must be done
   // before this ScopedClipboard is destroyed.
   HANDLE GetData(UINT format) {
     if (!opened_) {
       NOTREACHED();
-      return NULL;
+      return nullptr;
     }
     return ::GetClipboardData(format);
   }
 
  private:
   bool opened_;
 };
 
 typedef BOOL (WINAPI AddClipboardFormatListenerFn)(HWND);
 typedef BOOL (WINAPI RemoveClipboardFormatListenerFn)(HWND);
@@ skipping 25 matching lines @@
   AddClipboardFormatListenerFn* add_clipboard_format_listener_;
   RemoveClipboardFormatListenerFn* remove_clipboard_format_listener_;
 
   // Used to subscribe to WM_CLIPBOARDUPDATE messages.
   scoped_ptr<base::win::MessageWindow> window_;
 
   DISALLOW_COPY_AND_ASSIGN(ClipboardWin);
 };
 
 ClipboardWin::ClipboardWin()
-    : add_clipboard_format_listener_(NULL),
-      remove_clipboard_format_listener_(NULL) {
+    : add_clipboard_format_listener_(nullptr),
+      remove_clipboard_format_listener_(nullptr) {
 }
 
 void ClipboardWin::Start(
     scoped_ptr<protocol::ClipboardStub> client_clipboard) {
   DCHECK(!add_clipboard_format_listener_);
   DCHECK(!remove_clipboard_format_listener_);
   DCHECK(!window_);
 
   client_clipboard_.swap(client_clipboard);
 
@@ skipping 126 matching lines @@
   }
 
   return false;
 }
 
 scoped_ptr<Clipboard> Clipboard::Create() {
   return make_scoped_ptr(new ClipboardWin());
 }
 
 }  // namespace remoting