Componentize zombies to silence ObjC runtime errors in component builds

components/crash/core/common/objc_zombie.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 COMPONENTS_CRASH_CORE_COMMON_OBJC_ZOMBIE_H_
 #define COMPONENTS_CRASH_CORE_COMMON_OBJC_ZOMBIE_H_
 
 #include <stddef.h>
 
 #include "build/build_config.h"
+#include "components/crash/core/common/crash_export.h"
 
 // You should think twice every single time you use anything from this
 // namespace.
 namespace ObjcEvilDoers {
 
 // Enable zombie object debugging. This implements a variant of Apple's
 // NSZombieEnabled which can help expose use-after-free errors where messages
 // are sent to freed Objective-C objects in production builds.
 //
 // Returns NO if it fails to enable.
 //
 // When |zombieAllObjects| is YES, all objects inheriting from
 // NSObject become zombies on -dealloc.  If NO, -shouldBecomeCrZombie
 // is queried to determine whether to make the object a zombie.
 //
 // |zombieCount| controls how many zombies to store before freeing the
 // oldest.  Set to 0 to free objects immediately after making them
 // zombies.
-bool ZombieEnable(bool zombieAllObjects, size_t zombieCount);
+bool CRASH_EXPORT ZombieEnable(bool zombieAllObjects, size_t zombieCount);
 
 // Disable zombies.
-void ZombieDisable();
+void CRASH_EXPORT ZombieDisable();
 
 }  // namespace ObjcEvilDoers
 
 #if defined(OS_MACOSX)
 #if defined(__OBJC__)
 
 #import <Foundation/Foundation.h>
 
 @interface NSObject (CrZombie)
 - (BOOL)shouldBecomeCrZombie;
 @end
 
 #endif  // __OBJC__
 #endif  // OS_MACOSX
 
 #endif  // COMPONENTS_CRASH_CORE_COMMON_OBJC_ZOMBIE_H_