Precompilation: Don't look at embedder allocated pages when finalizing the VM isolate.

runtime/vm/pages.h

 // Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef VM_PAGES_H_
 #define VM_PAGES_H_
 
 #include "vm/freelist.h"
 #include "vm/globals.h"
 #include "vm/lockers.h"
@@ skipping 34 matching lines @@
     return memory_->start() + ObjectStartOffset();
   }
   uword object_end() const {
     return object_end_;
   }
 
   PageType type() const {
     return type_;
   }
 
+  bool embedder_allocated() const { return memory_->embedder_allocated(); }
+
   void VisitObjects(ObjectVisitor* visitor) const;
   void VisitObjectPointers(ObjectPointerVisitor* visitor) const;
 
   RawObject* FindObject(FindObjectVisitor* visitor) const;
 
   void WriteProtect(bool read_only);
 
   static intptr_t ObjectStartOffset() {
     return Utils::RoundUp(sizeof(HeapPage), OS::kMaxPreferredCodeAlignment);
   }
@@ skipping 182 matching lines @@
     return usage_;
   }
 
   bool Contains(uword addr) const;
   bool Contains(uword addr, HeapPage::PageType type) const;
   bool IsValidAddress(uword addr) const {
     return Contains(addr);
   }
 
   void VisitObjects(ObjectVisitor* visitor) const;
+  void VisitObjectsNoEmbedderPages(ObjectVisitor* visitor) const;
   void VisitObjectPointers(ObjectPointerVisitor* visitor) const;
 
   RawObject* FindObject(FindObjectVisitor* visitor,
                         HeapPage::PageType type) const;
 
   // Checks if enough time has elapsed since the last attempt to collect
   // code.
   bool ShouldCollectCode();
 
   // Collect the garbage in the page space using mark-sweep.
@@ skipping 18 matching lines @@
     return page_space_controller_.is_enabled();
   }
 
   bool NeedsExternalGC() const {
     return (max_external_in_words_ != 0) &&
         (ExternalInWords() > max_external_in_words_);
   }
 
   // Note: Code pages are made executable/non-executable when 'read_only' is
   // true/false, respectively.
-  void WriteProtect(bool read_only, bool include_code_pages);
+  void WriteProtect(bool read_only);
   void WriteProtectCode(bool read_only);
 
   void AddGCTime(int64_t micros) {
     gc_time_micros_ += micros;
   }
 
   int64_t gc_time_micros() const {
     return gc_time_micros_;
   }
 
@@ skipping 150 matching lines @@
   friend class HeapIterationScope;
   friend class PageSpaceController;
   friend class SweeperTask;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(PageSpace);
 };
 
 }  // namespace dart
 
 #endif  // VM_PAGES_H_