Move reusable handles from isolate to thread.

runtime/vm/handles.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_HANDLES_H_
 #define VM_HANDLES_H_
 
 #include "vm/allocation.h"
 #include "vm/flags.h"
 #include "vm/os.h"
@@ skipping 40 matching lines @@
 // add code that will allocate new handles during this critical area.
 // {
 //   NOHANDLESCOPE(isolate);
 //   ....
 //   ....
 // }
 
 
 // Forward declarations.
 class ObjectPointerVisitor;
+class Thread;
 
 DECLARE_FLAG(bool, verify_handles);
 DECLARE_DEBUG_FLAG(bool, trace_handles);
 
 class HandleVisitor {
  public:
-  explicit HandleVisitor(Isolate* isolate) : isolate_(isolate) {}
+  explicit HandleVisitor(Thread* thread) : thread_(thread) {}
   virtual ~HandleVisitor() {}
 
-  Isolate* isolate() const { return isolate_; }
+  Thread* thread() const { return thread_; }
 
   virtual void VisitHandle(uword addr) = 0;
 
  private:
-  Isolate* isolate_;
+  Thread* thread_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(HandleVisitor);
 };
 
 
 template <int kHandleSizeInWords, int kHandlesPerChunk, int kOffsetOfRawPtr>
 class Handles {
  public:
   Handles()
       : zone_blocks_(NULL),
@@ skipping 145 matching lines @@
   void ZapFreeScopedHandles();
 #endif
 
   HandlesBlock* zone_blocks_;  // List of zone handles.
   HandlesBlock first_scoped_block_;  // First block of scoped handles.
   HandlesBlock* scoped_blocks_;  // List of scoped handles.
 
   friend class HandleScope;
   friend class Dart;
   friend class ObjectStore;
-  friend class Isolate;
+  friend class Thread;
   DISALLOW_ALLOCATION();
   DISALLOW_COPY_AND_ASSIGN(Handles);
 };
 
 
 static const int kVMHandleSizeInWords = 2;
 static const int kVMHandlesPerChunk = 64;
 static const int kOffsetOfRawPtr = kWordSize;
 class VMHandles : public Handles<kVMHandleSizeInWords,
                                  kVMHandlesPerChunk,
@@ skipping 101 matching lines @@
 };
 #endif  // defined(DEBUG)
 
 // Macro to start a no handles scope in the code.
 #define NOHANDLESCOPE(isolate_or_thread)                                       \
     dart::NoHandleScope no_vm_internal_handles_scope_(isolate_or_thread);
 
 }  // namespace dart
 
 #endif  // VM_HANDLES_H_