Changes to pass the current isolate to all runtime and native calls.

runtime/vm/zone.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_ZONE_H_
 #define VM_ZONE_H_
 
 #include "vm/allocation.h"
 #include "vm/handles.h"
 #include "vm/memory_region.h"
 #include "vm/utils.h"
 
 namespace dart {
 
 // Zones support very fast allocation of small chunks of memory. The
 // chunks cannot be deallocated individually, but instead zones
 // support deallocating all chunks in one fast operation.
 
 class BaseZone {
- public:
-
  private:
   BaseZone();
   ~BaseZone();  // Delete all memory associated with the zone.
 
   // Allocate 'size' bytes of memory in the zone; expands the zone by
   // allocating new segments of memory on demand using 'new'.
   inline uword Allocate(intptr_t size);
 
   // Allocate 'new_size' bytes of memory and copies 'old_size' bytes from
   // 'data' into new allocated memory. Uses current zone.
@@ skipping 61 matching lines @@
 
   friend class Zone;
   friend class ApiZone;
   DISALLOW_COPY_AND_ASSIGN(BaseZone);
 };
 
 
 class Zone : public StackResource {
  public:
   // Create an empty zone and set is at the current zone for the Isolate.
-  Zone();
+  explicit Zone(Isolate* isolate);
 
   // Delete all memory associated with the zone.
   ~Zone();
 
   // Allocate 'size' bytes of memory in the zone; expands the zone by
   // allocating new segments of memory on demand using 'new'.
   uword Allocate(intptr_t size) { return zone_.Allocate(size); }
 
   // Allocate 'new_size' bytes of memory and copies 'old_size' bytes from
   // 'data' into new allocated memory. Uses current zone.
@@ skipping 43 matching lines @@
   }
 
   // Check that the result has the proper alignment and return it.
   ASSERT(Utils::IsAligned(result, kAlignment));
   return result;
 }
 
 }  // namespace dart
 
 #endif  // VM_ZONE_H_