[heap] Make the current GCCallbackFlags are part of {Heap}.

src/heap/heap.h

Index: src/heap/heap.h
diff --git a/src/heap/heap.h b/src/heap/heap.h
index 48b0c6fe5bcfeaceee9c5521d132f070b53b15ce..70ed115e458dd79ebf88a2c82502cb073fcff2f0 100644
--- a/src/heap/heap.h
+++ b/src/heap/heap.h
@@ -1397,7 +1397,8 @@ class Heap {
   // Starts incremental marking assuming incremental marking is currently
   // stopped.
   void StartIncrementalMarking(int gc_flags,

[Hannes Payer (out of office), 2015/08/25 08:35:27]

Can we make change the int gc_flags to an enum, you can do that in a separate
cl.

The flags could also have a default parameter.

[Michael Lippautz, 2015/08/25 08:54:17]

Acknowledged and Done.

-                               const GCCallbackFlags gc_callback_flags,
+                               const GCCallbackFlags gc_callback_flags =
+                                   GCCallbackFlags::kNoGCCallbackFlags,
                                const char* reason = nullptr);
 
   // Performs incremental marking steps of step_size_in_bytes as long as
@@ -1735,6 +1736,14 @@ class Heap {
            !ShouldAbortIncrementalMarking());
   }
 
+  GCCallbackFlags current_gc_callback_flags() {
+    return current_gc_callback_flags_;
+  }
+
+  void set_current_gc_callback_flags(GCCallbackFlags callback_flags) {
+    current_gc_callback_flags_ = callback_flags;
+  }
+
   inline bool ShouldReduceMemory() const {
     return current_gc_flags_ & kReduceMemoryFootprintMask;
   }
@@ -2335,6 +2344,8 @@ class Heap {
   // Currently set GC flags that are respected by all GC components.
   int current_gc_flags_;
 
+  GCCallbackFlags current_gc_callback_flags_;

[Hannes Payer (out of office), 2015/08/25 08:35:27]

Describe what these flags are doing.

[Michael Lippautz, 2015/08/25 08:54:17]

Done.

+
   ExternalStringTable external_string_table_;
 
   VisitorDispatchTable<ScavengingCallback> scavenging_visitors_table_;