Clean up header files.

ui/base/win/accessibility_ids_win.h

 // Copyright (c) 2013 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 UI_BASE_WIN_ACCESSIBILITY_IDS_WIN_H_
 #define UI_BASE_WIN_ACCESSIBILITY_IDS_WIN_H_
 
+#include <limits.h>
+
 namespace base {
 namespace win {
 
 // Windows accessibility (MSAA) notifications are posted on an
 // accessible object using its owning HWND and a long integer child id.
 // Positive child ids can be used to enumerate the children of an object,
 // so in Chromium we use only negative values to represent ids of specific
 // accessible objects.
 //
 // Chromium currently has two separate systems that use accessibility ids:
 // * views (ui/views/accessibility), and
 // * web (content/browser/accessibility)
 //
 // These constants ensure they use non-overlapping id ranges.
 
 const long kFirstViewsAccessibilityId = -1;
 const long kLastViewsAccessibilityId = -999;
 const long kFirstBrowserAccessibilityManagerAccessibilityId = -1000;
 const long kLastBrowserAccessibilityManagerAccessibilityId = INT_MIN;
 
 }  // win
 }  // base
 
 #endif  // UI_BASE_WIN_ACCESSIBILITY_IDS_WIN_H_