Revert "Make GCC happy again." and "Initial switch to Chromium-style CHECK_* and DCHECK_* macros.".

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 {
 
@@ skipping 88 matching lines @@
 Zone* ZonePool::NewEmptyZone() {
   Zone* zone;
   // Grab a zone from pool if possible.
   if (!unused_.empty()) {
     zone = unused_.back();
     unused_.pop_back();
   } else {
     zone = new Zone();
   }
   used_.push_back(zone);
-  DCHECK_EQ(0u, zone->allocation_size());
+  DCHECK_EQ(0, 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_) {
     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());
+    DCHECK_EQ(0, zone->allocation_size());
     unused_.push_back(zone);
   }
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8