Move idle notification handling to GCIdleTimeHandler.

src/heap/gc-tracer.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/v8.h"
 
 #include "src/heap/gc-tracer.h"
 
 namespace v8 {
 namespace internal {
@@ skipping 400 matching lines @@
   while (iter != scavenger_events_.end()) {
     bytes += iter->new_space_object_size;
     durations += iter->end_time - iter->start_time;
     ++iter;
   }
 
   if (durations == 0.0) return 0;
 
   return static_cast<intptr_t>(bytes / durations);
 }
+
+
+intptr_t GCTracer::MaxMarkSweepSpeedInBytesPerMillisecond() const {
+  intptr_t speed = 0;
+  EventBuffer::const_iterator iter = mark_compactor_events_.begin();
+  while (iter != mark_compactor_events_.end()) {
+    intptr_t bytes = iter->new_space_object_size;
+    double duration = iter->end_time - iter->start_time;
+    if (duration > 0) {
+      intptr_t current_speed = static_cast<intptr_t>(bytes / duration);
+      speed = Max(speed, current_speed);
+    }
+    ++iter;
+  }
+  return speed;
+}
 }
 }  // namespace v8::internal