Stop using an atom to store plugin name/version on Windows.

content/common/plugin_constants_win.h

 // Copyright (c) 2011 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 CONTENT_COMMON_PLUGIN_CONSTANTS_WIN_H_
 #define CONTENT_COMMON_PLUGIN_CONSTANTS_WIN_H_
 
 #include "base/strings/string16.h"
 
 #if !defined(OS_WIN)
 #error "Windows-only header"
 #endif
 
 namespace content {
 
 // The window class name for a plugin window.
 extern const base::char16 kNativeWindowClassName[];
 
 // The name of the window class name for the wrapper HWND around the actual
 // plugin window that's used when running in multi-process mode.  This window
 // is created on the browser UI thread.
 extern const base::char16 kWrapperNativeWindowClassName[];
 
-extern const base::char16 kPluginNameAtomProperty[];
-extern const base::char16 kPluginVersionAtomProperty[];
 extern const base::char16 kDummyActivationWindowName[];
 
 // The name of the custom window message that the browser uses to tell the
 // plugin process to paint a window.
 extern const base::char16 kPaintMessageName[];
 
 // The name of the registry key which NPAPI plugins update on installation.
 extern const base::char16 kRegistryMozillaPlugins[];
 
 extern const base::char16 kMozillaActiveXPlugin[];
 extern const base::char16 kNewWMPPlugin[];
 extern const base::char16 kOldWMPPlugin[];
 extern const base::char16 kYahooApplicationStatePlugin[];
 extern const base::char16 kWanWangProtocolHandlerPlugin[];
 extern const base::char16 kFlashPlugin[];
 extern const base::char16 kAcrobatReaderPlugin[];
 extern const base::char16 kRealPlayerPlugin[];
 extern const base::char16 kSilverlightPlugin[];
 extern const base::char16 kJavaPlugin1[];
 extern const base::char16 kJavaPlugin2[];
 
 extern const char kGPUPluginMimeType[];
 
 extern const base::char16 kPluginDummyParentProperty[];
 
 }  // namespace content
 
 #endif  // CONTENT_COMMON_PLUGIN_CONSTANTS_WIN_H_