Oilpan: Revert r169564: Disable the GC_PLUGIN_IGNORE annotation when compiling with asan.

Source/platform/heap/Heap.h

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 1126 matching lines @@
 
 #endif
 
 
 // These macros insert annotations that the Blink GC plugin for clang uses for
 // verification. STACK_ALLOCATED is used to declare that objects of this type
 // are always stack allocated. GC_PLUGIN_IGNORE is used to make the plugin
 // ignore a particular class or field when checking for proper usage. When using
 // GC_PLUGIN_IGNORE a bug-number should be provided as an argument where the
 // bug describes what needs to happen to remove the GC_PLUGIN_IGNORE again.
-#if COMPILER(CLANG) && !defined(ADDRESS_SANITIZER)
+#if COMPILER(CLANG)
 #define STACK_ALLOCATED()                                       \
     private:                                                    \
         __attribute__((annotate("blink_stack_allocated")))      \
         void* operator new(size_t) = delete;                    \
         void* operator new(size_t, NotNullTag, void*) = delete; \
         void* operator new(size_t, void*) = delete;
 
 #define GC_PLUGIN_IGNORE(bug)                           \
     __attribute__((annotate("blink_gc_plugin_ignore")))
 #else
@@ skipping 865 matching lines @@
 // to export. This forces it to export all the methods from ThreadHeap.
 template<> void ThreadHeap<FinalizedHeapObjectHeader>::addPageToHeap(const GCInfo*);
 template<> void ThreadHeap<HeapObjectHeader>::addPageToHeap(const GCInfo*);
 extern template class PLATFORM_EXPORT ThreadHeap<FinalizedHeapObjectHeader>;
 extern template class PLATFORM_EXPORT ThreadHeap<HeapObjectHeader>;
 #endif
 
 }
 
 #endif // Heap_h