Revert 49989 - x

chrome/browser/cocoa/objc_zombie.mm

 // Copyright (c) 2010 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.
 
 #import "chrome/browser/cocoa/objc_zombie.h"
 
 #include <dlfcn.h>
 #include <mach-o/dyld.h>
 #include <mach-o/nlist.h>
 
@@ skipping 82 matching lines @@
       nl[0].n_type == N_UNDF || nl[1].n_type == N_UNDF)
     return NULL;
 
   return (DestructFn*)((char*)&class_addIvar - nl[1].n_value + nl[0].n_value);
 }
 
 // Replacement |-dealloc| which turns objects into zombies and places
 // them into |g_zombies| to be freed later.
 void ZombieDealloc(id self, SEL _cmd) {
   // This code should only be called when it is implementing |-dealloc|.
-  //DCHECK_EQ(_cmd, @selector(dealloc));  // clang
+  DCHECK_EQ(_cmd, @selector(dealloc));
 
   // Use the original |-dealloc| if the object doesn't wish to be
   // zombied.
   if (!g_zombieAllObjects && ![self shouldBecomeCrZombie]) {
     g_originalDeallocIMP(self, _cmd);
     return;
   }
 
   // Use the original |-dealloc| if |object_cxxDestruct| was never
   // initialized, because otherwise C++ destructors won't be called.
@@ skipping 258 matching lines @@
   if (oldZombies) {
     for (size_t i = 0; i < oldCount; ++i) {
       if (oldZombies[i].object)
         free(oldZombies[i].object);
     }
     free(oldZombies);
   }
 }
 
 }  // namespace ObjcEvilDoers