Get rid of some more dependencies on chrome\common from plugin, in preparatio...

chrome/common/plugin_carbon_interpose_constants_mac.h

Index: chrome/common/plugin_carbon_interpose_constants_mac.h
===================================================================
--- chrome/common/plugin_carbon_interpose_constants_mac.h	(revision 78225)
+++ chrome/common/plugin_carbon_interpose_constants_mac.h	(working copy)
@@ -1,21 +0,0 @@
-// 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_COMMON_PLUGIN_CARBON_INTERPOSE_CONSTANTS_MAC_H_
-#define CHROME_COMMON_PLUGIN_CARBON_INTERPOSE_CONSTANTS_MAC_H_
-#pragma once
-
-#if !defined(__LP64__)
-
-// Strings used in setting up Carbon interposing for the plugin process.
-namespace plugin_interpose_strings {
-
-extern const char kDYLDInsertLibrariesKey[];
-extern const char kInterposeLibraryPath[];
-
-}  // namespace plugin_interpose_strings
-
-#endif  // !__LP64__
-
-#endif  // CHROME_BROWSER_PLUGIN_CARBON_INTERPOSE_CONSTANTS_MAC_H_