Add more safe points in compiler

runtime/vm/heap.h

Index: runtime/vm/heap.h
diff --git a/runtime/vm/heap.h b/runtime/vm/heap.h
index 5ae4361e78a12413caae0cc66dc58d040b10c05b..2b52b0024b66dfcaeadb9b12f46d95a116feb73c 100644
--- a/runtime/vm/heap.h
+++ b/runtime/vm/heap.h
@@ -216,7 +216,7 @@ class Heap {
 
   // Stats collection.
   void RecordTime(int id, int64_t micros) {
-    ASSERT((id >= 0) && (id < GCStats::kDataEntries));
+    ASSERT((id >= 0) && (id < GCStats::kTimeEntries));
     stats_.times_[id] = micros;
   }
 
@@ -268,11 +268,12 @@ class Heap {
       DISALLOW_COPY_AND_ASSIGN(Data);
     };
 
+    enum { kTimeEntries = 5 };
     enum { kDataEntries = 4 };
 
     Data before_;
     Data after_;
-    int64_t times_[kDataEntries];
+    int64_t times_[kTimeEntries];
     intptr_t data_[kDataEntries];
 
    private: