clang/win: Fix a Wenum-compare warning and a few Wwritable-strings warnings.

rlz/win/lib/process_info.h

 // 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.
 //
 // Information about the current process.
 
 #ifndef RLZ_WIN_LIB_PROCESS_INFO_H_
 #define RLZ_WIN_LIB_PROCESS_INFO_H_
 
 #include "base/basictypes.h"
 
 namespace rlz_lib {
 
 class ProcessInfo {
  public:
-  enum IntegrityLevel {
-    INTEGRITY_UNKNOWN,
-    LOW_INTEGRITY,
-    MEDIUM_INTEGRITY,
-    HIGH_INTEGRITY,
-  };
-
   // All these functions cache the result after first run.
   static bool IsRunningAsSystem();
   static bool HasAdminRights();  // System / Admin / High Elevation on Vista
 
  private:
   DISALLOW_COPY_AND_ASSIGN(ProcessInfo);
 };  // class
 };  // namespace
 
 #endif  // RLZ_WIN_LIB_PROCESS_INFO_H_