- Canonicalize types, type_arguments only when the object is marked as being from the core librarie…

runtime/vm/pages.h

Index: runtime/vm/pages.h
===================================================================
--- runtime/vm/pages.h	(revision 20419)
+++ runtime/vm/pages.h	(working copy)
@@ -127,9 +127,12 @@
   void EvaluateGarbageCollection(intptr_t in_use_before, intptr_t in_use_after,
                                  int64_t start, int64_t end);
 
-  void Enable() {
-    is_enabled_ = true;
+  void set_is_enabled(bool state) {
+    is_enabled_ = state;
   }
+  bool is_enabled() {
+    return is_enabled_;
+  }
 
  private:
   bool is_enabled_;
@@ -204,10 +207,14 @@
 
   void StartEndAddress(uword* start, uword* end) const;
 
-  void EnableGrowthControl() {
-    page_space_controller_.Enable();
+  void SetGrowthControlState(bool state) {
+    page_space_controller_.set_is_enabled(state);
   }
 
+  bool GrowthControlState() {
+    return page_space_controller_.is_enabled();
+  }
+
   void WriteProtect(bool read_only);
 
   typedef std::map<RawObject*, void*> PeerTable;