[turbofan] More "auto" keyword cleanup

src/compiler/zone-pool.cc

 // Copyright 2014 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/compiler/zone-pool.h"
 
 namespace v8 {
 namespace internal {
 namespace compiler {
 
 ZonePool::StatsScope::StatsScope(ZonePool* zone_pool)
     : zone_pool_(zone_pool),
       total_allocated_bytes_at_start_(zone_pool->GetTotalAllocatedBytes()),
       max_allocated_bytes_(0) {
   zone_pool_->stats_.push_back(this);
-  for (auto zone : zone_pool_->used_) {
+  for (Zone* zone : zone_pool_->used_) {
     size_t size = static_cast<size_t>(zone->allocation_size());
     std::pair<InitialValues::iterator, bool> res =
         initial_values_.insert(std::make_pair(zone, size));
     USE(res);
     DCHECK(res.second);
   }
 }
 
 
 ZonePool::StatsScope::~StatsScope() {
@@ skipping 82 matching lines @@
   DCHECK_EQ(0u, zone->allocation_size());
   return zone;
 }
 
 
 void ZonePool::ReturnZone(Zone* zone) {
   size_t current_total = GetCurrentAllocatedBytes();
   // Update max.
   max_allocated_bytes_ = std::max(max_allocated_bytes_, current_total);
   // Update stats.
-  for (auto stat_scope : stats_) {
+  for (StatsScope* stat_scope : stats_) {
     stat_scope->ZoneReturned(zone);
   }
   // Remove from used.
   Used::iterator it = std::find(used_.begin(), used_.end(), zone);
   DCHECK(it != used_.end());
   used_.erase(it);
   total_deleted_bytes_ += static_cast<size_t>(zone->allocation_size());
   // Delete zone or clear and stash on unused_.
   if (unused_.size() >= kMaxUnusedSize) {
     delete zone;
   } else {
     zone->DeleteAll();
     DCHECK_EQ(0u, zone->allocation_size());
     unused_.push_back(zone);
   }
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8