[turbofan] add absolute peak to stats

src/compilation-statistics.h

 // 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.
 
 #ifndef V8_COMPILATION_STATISTICS_H_
 #define V8_COMPILATION_STATISTICS_H_
 
 #include <map>
 #include <string>
 
 #include "src/allocation.h"
 #include "src/base/platform/time.h"
 
 namespace v8 {
 namespace internal {
 
 class CompilationInfo;
 
 class CompilationStatistics FINAL : public Malloced {
  public:
   CompilationStatistics() {}
 
   class BasicStats {
    public:
-    BasicStats() : total_allocated_bytes_(0), max_allocated_bytes_(0) {}
+    BasicStats()
+        : total_allocated_bytes_(0),
+          max_allocated_bytes_(0),
+          absolute_max_allocated_bytes_(0) {}
 
     void Accumulate(const BasicStats& stats);
 
     base::TimeDelta delta_;
     size_t total_allocated_bytes_;
     size_t max_allocated_bytes_;
+    size_t absolute_max_allocated_bytes_;
     std::string function_name_;
   };
 
   void RecordPhaseStats(const char* phase_kind_name, const char* phase_name,
                         const BasicStats& stats);
 
   void RecordPhaseKindStats(const char* phase_kind_name,
                             const BasicStats& stats);
 
   void RecordTotalStats(size_t source_size, const BasicStats& stats);
@@ skipping 31 matching lines @@
 
   DISALLOW_COPY_AND_ASSIGN(CompilationStatistics);
 };
 
 std::ostream& operator<<(std::ostream& os, const CompilationStatistics& s);
 
 }  // namespace internal
 }  // namespace v8
 
 #endif