Remove unused class AssertNoZoneAllocation.

BUG=v8:1962
TEST=

Review URL: https://chromiumcodereview.appspot.com/9430044

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10792 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/isolate.h

@@ -333,8 +333,6 @@ class HashMap;
 typedef List<HeapObject*, PreallocatedStorage> DebugObjectCache;
 
 #define ISOLATE_INIT_LIST(V)                                                   \
-  /* AssertNoZoneAllocation state. */                                          \
-  V(bool, zone_allow_allocation, true)                                         \
   /* SerializerDeserializer state. */                                          \
   V(int, serialize_partial_snapshot_cache_length, 0)                           \
   /* Assembler state. */                                                       \

src/zone-inl.h

@@ -39,19 +39,7 @@ namespace v8 {
 namespace internal {
 
 
-AssertNoZoneAllocation::AssertNoZoneAllocation()
-    : prev_(Isolate::Current()->zone_allow_allocation()) {
-  Isolate::Current()->set_zone_allow_allocation(false);
-}
-
-
-AssertNoZoneAllocation::~AssertNoZoneAllocation() {
-  Isolate::Current()->set_zone_allow_allocation(prev_);
-}
-
-
 inline void* Zone::New(int size) {
-  ASSERT(Isolate::Current()->zone_allow_allocation());
   ASSERT(ZoneScope::nesting() > 0);
   // Round up the requested size to fit the alignment.
   size = RoundUp(size, kAlignment);

src/zone.h

@@ -163,15 +163,6 @@ class ZoneObject {
 };
 
 
-class AssertNoZoneAllocation {
- public:
-  inline AssertNoZoneAllocation();
-  inline ~AssertNoZoneAllocation();
- private:
-  bool prev_;
-};
-
-
 // The ZoneListAllocationPolicy is used to specialize the GenericList
 // implementation to allocate ZoneLists and their elements in the
 // Zone.