1. Added new flag verify_gc_contains and moved all the asserts that do a

runtime/vm/heap.cc

 // Copyright (c) 2012, 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.
 
 #include "vm/heap.h"
 
 #include "platform/assert.h"
 #include "platform/utils.h"
 #include "vm/flags.h"
 #include "vm/isolate.h"
@@ skipping 160 matching lines @@
 bool Heap::OldContains(uword addr) const {
   return old_space_.Contains(addr);
 }
 
 
 bool Heap::CodeContains(uword addr) const {
   return old_space_.Contains(addr, HeapPage::kExecutable);
 }
 
 
+bool Heap::DataContains(uword addr) const {
+  return old_space_.DataContains(addr);
+}
+
+
 void Heap::VisitObjects(ObjectVisitor* visitor) const {
   new_space_.VisitObjects(visitor);
   old_space_.VisitObjects(visitor);
 }
 
 
 HeapIterationScope::HeapIterationScope(bool writable)
     : StackResource(Thread::Current()),
       old_space_(isolate()->heap()->old_space()),
       writable_(writable) {
@@ skipping 631 matching lines @@
   Dart::vm_isolate()->heap()->WriteProtect(false);
 }
 
 
 WritableVMIsolateScope::~WritableVMIsolateScope() {
   ASSERT(Dart::vm_isolate()->heap()->UsedInWords(Heap::kNew) == 0);
   Dart::vm_isolate()->heap()->WriteProtect(true);
 }
 
 }  // namespace dart