Mac: Some clang appeasing.

chrome/default_plugin/plugin_impl_win.h

 // Copyright (c) 2009 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.
 
 #ifndef CHROME_DEFAULT_PLUGIN_PLUGIN_IMPL_WIN_H_
 #define CHROME_DEFAULT_PLUGIN_PLUGIN_IMPL_WIN_H_
 #pragma once
 
 #include <string>
 #include <vector>
@@ skipping 156 matching lines @@
   // state of the plugin installer.
   void set_plugin_installer_state(PluginInstallerState new_state) {
     plugin_installer_state_ = new_state;
   }
 
   PluginInstallerState plugin_installer_state() const {
     return plugin_installer_state_;
   }
 
   // Getter for the NPP instance member.
-  const NPP instance() const {
+  NPP instance() const {
     return instance_;
   }
 
   // Returns whether or not the UI layout is right-to-left (such as Hebrew or
   // Arabic).
   static bool IsRTLLayout();
 
  protected:
   // Window message handlers.
   LRESULT OnPaint(UINT message, WPARAM wparam, LPARAM lparam, BOOL& handled);
@@ skipping 120 matching lines @@
   HFONT regular_font_;
   HFONT underline_font_;
   // Tooltip Window.
   HWND tooltip_;
 
   DISALLOW_COPY_AND_ASSIGN(PluginInstallerImpl);
 };
 
 
 #endif  // CHROME_DEFAULT_PLUGIN_PLUGIN_IMPL_WIN_H_