[heap] Remove unflattened_string_length

src/heap/heap.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/heap/heap.h"
 
 #include "src/accessors.h"
 #include "src/api.h"
 #include "src/base/bits.h"
 #include "src/base/once.h"
@@ skipping 71 matching lines @@
       map_space_(NULL),
       lo_space_(NULL),
       gc_state_(NOT_IN_GC),
       gc_post_processing_depth_(0),
       allocations_count_(0),
       raw_allocations_hash_(0),
       dump_allocations_hash_countdown_(FLAG_dump_allocations_digest_at_alloc),
       ms_count_(0),
       gc_count_(0),
       remembered_unmapped_pages_index_(0),
-      unflattened_strings_length_(0),
 #ifdef DEBUG
       allocation_timeout_(0),
 #endif  // DEBUG
       old_generation_allocation_limit_(initial_old_generation_size_),
       old_gen_exhausted_(false),
       optimize_for_memory_usage_(false),
       inline_allocation_disabled_(false),
       store_buffer_rebuilder_(store_buffer()),
       hidden_string_(NULL),
       total_regexp_code_generated_(0),
@@ skipping 292 matching lines @@
 
 void Heap::IncrementDeferredCount(v8::Isolate::UseCounterFeature feature) {
   deferred_counters_[feature]++;
 }
 
 
 void Heap::GarbageCollectionPrologue() {
   {
     AllowHeapAllocation for_the_first_part_of_prologue;
     gc_count_++;
-    unflattened_strings_length_ = 0;
 
     if (FLAG_flush_code) {
       mark_compact_collector()->EnableCodeFlushing(true);
     }
 
 #ifdef VERIFY_HEAP
     if (FLAG_verify_heap) {
       Verify();
     }
 #endif
@@ skipping 6487 matching lines @@
     *object_type = "CODE_TYPE";                                                \
     *object_sub_type = "CODE_AGE/" #name;                                      \
     return true;
     CODE_AGE_LIST_COMPLETE(COMPARE_AND_RETURN_NAME)
 #undef COMPARE_AND_RETURN_NAME
   }
   return false;
 }
 }  // namespace internal
 }  // namespace v8