Move idle notification handling to GCIdleTimeHandler.

src/heap/gc-tracer.h

Index: src/heap/gc-tracer.h
diff --git a/src/heap/gc-tracer.h b/src/heap/gc-tracer.h
index fd53d3c31ce7121c49f836e1bcf46546e32d5ac4..0524f25e500c502acbab951eda3a97054a5fe968 100644
--- a/src/heap/gc-tracer.h
+++ b/src/heap/gc-tracer.h
@@ -5,6 +5,8 @@
 #ifndef V8_HEAP_GC_TRACER_H_
 #define V8_HEAP_GC_TRACER_H_
 
+#include "src/base/platform/platform.h"
+
 namespace v8 {
 namespace internal {
 
@@ -81,9 +83,9 @@ class RingBuffer {
 // GCTracer collects and prints ONE line after each garbage collector
 // invocation IFF --trace_gc is used.
 // TODO(ernstm): Unit tests.
-class GCTracer BASE_EMBEDDED {
+class GCTracer {
  public:
-  class Scope BASE_EMBEDDED {
+  class Scope {
    public:
     enum ScopeId {
       EXTERNAL,
@@ -291,6 +293,10 @@ class GCTracer BASE_EMBEDDED {
   // Returns 0 if no events have been recorded.
   intptr_t ScavengeSpeedInBytesPerMillisecond() const;
 
+  // Compute the max mark-sweep speed in bytes/millisecond.
+  // Returns 0 if no events have been recorded.
+  intptr_t MarkCompactSpeedInBytesPerMillisecond() const;
+
  private:
   // Print one detailed trace line in name=value format.
   // TODO(ernstm): Move to Heap.