Update gc branch to bleeding_edge revision 8862.

src/elements.h

-// Copyright 2006-2008 the V8 project authors. All rights reserved.
+// Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
 //       with the distribution.
 //     * Neither the name of Google Inc. nor the names of its
 //       contributors may be used to endorse or promote products derived
 //       from this software without specific prior written permission.
 //
 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-// A simple interactive shell.  Enable with --shell.
 
-#ifndef V8_SHELL_H_
-#define V8_SHELL_H_
+#ifndef V8_ELEMENTS_H_
+#define V8_ELEMENTS_H_
 
-#include "../public/debug.h"
+#include "objects.h"
 
 namespace v8 {
 namespace internal {
 
-// Debug event handler for interactive debugging.
-void handle_debug_event(v8::DebugEvent event,
-                        v8::Handle<v8::Object> exec_state,
-                        v8::Handle<v8::Object> event_data,
-                        v8::Handle<Value> data);
+// Abstract base class for handles that can operate on objects with differing
+// ElementsKinds.
+class ElementsAccessor {
+ public:
+  ElementsAccessor() { }
+  virtual ~ElementsAccessor() { }
+  virtual MaybeObject* GetWithReceiver(JSObject* obj,
+                                       Object* receiver,
+                                       uint32_t index) = 0;
 
+  virtual MaybeObject* Delete(JSObject* obj,
+                              uint32_t index,
+                              JSReceiver::DeleteMode mode) = 0;
 
-class Shell {
- public:
-  static void PrintObject(v8::Handle<v8::Value> obj);
-  // Run the read-eval loop, executing code in the specified
-  // environment.
-  static void Run(v8::Handle<v8::Context> context);
+  // Returns a shared ElementsAccessor for the specified ElementsKind.
+  static ElementsAccessor* ForKind(JSObject::ElementsKind elements_kind) {
+    ASSERT(elements_kind < JSObject::kElementsKindCount);
+    return elements_accessors_[elements_kind];
+  }
+
+  static void InitializeOncePerProcess();
+
+ private:
+  static ElementsAccessor** elements_accessors_;
+
+  DISALLOW_COPY_AND_ASSIGN(ElementsAccessor);
 };
 
 } }  // namespace v8::internal
 
-#endif  // V8_SHELL_H_
+#endif  // V8_ELEMENTS_H_