Remove unused GcTracer functions.

src/heap/gc-tracer.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_HEAP_GC_TRACER_H_
 #define V8_HEAP_GC_TRACER_H_
 
 #include "src/base/platform/platform.h"
 #include "src/counters.h"
 #include "src/globals.h"
@@ skipping 358 matching lines @@
   // Log time spent in sweeping on main thread.
   void AddSweepingTime(double duration) {
     cumulative_sweeping_duration_ += duration;
   }
 
   // Time spent in sweeping on main thread.
   double cumulative_sweeping_duration() const {
     return cumulative_sweeping_duration_;
   }
 
-  // Compute the mean duration of the last scavenger events. Returns 0 if no
-  // events have been recorded.
-  double MeanScavengerDuration() const {
-    return MeanDuration(scavenger_events_);
-  }
-
-  // Compute the max duration of the last scavenger events. Returns 0 if no
-  // events have been recorded.
-  double MaxScavengerDuration() const { return MaxDuration(scavenger_events_); }
-
-  // Compute the mean duration of the last mark compactor events. Returns 0 if
-  // no events have been recorded.
-  double MeanMarkCompactorDuration() const {
-    return MeanDuration(mark_compactor_events_);
-  }
-
-  // Compute the max duration of the last mark compactor events. Return 0 if no
-  // events have been recorded.
-  double MaxMarkCompactorDuration() const {
-    return MaxDuration(mark_compactor_events_);
-  }
-
-  // Compute the mean duration of the last incremental mark compactor
-  // events. Returns 0 if no events have been recorded.
-  double MeanIncrementalMarkCompactorDuration() const {
-    return MeanDuration(incremental_mark_compactor_events_);
-  }
-
-  // Compute the mean step duration of the last incremental marking round.
-  // Returns 0 if no incremental marking round has been completed.
-  double MeanIncrementalMarkingDuration() const;
-
-  // Compute the max step duration of the last incremental marking round.
-  // Returns 0 if no incremental marking round has been completed.
-  double MaxIncrementalMarkingDuration() const;
-
   // Compute the average incremental marking speed in bytes/millisecond.
   // Returns 0 if no events have been recorded.
   intptr_t IncrementalMarkingSpeedInBytesPerMillisecond() const;
 
   // Compute the average scavenge speed in bytes/millisecond.
   // Returns 0 if no events have been recorded.
   intptr_t ScavengeSpeedInBytesPerMillisecond(
       ScavengeSpeedMode mode = kForAllObjects) const;
 
   // Compute the average compaction speed in bytes/millisecond.
@@ skipping 191 matching lines @@
 
   // Separate timer used for --runtime_call_stats
   RuntimeCallTimer timer_;
 
   DISALLOW_COPY_AND_ASSIGN(GCTracer);
 };
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_HEAP_GC_TRACER_H_