Update gc branch to bleeding_edge revision 8862.

src/elements.h

Index: src/elements.h
diff --git a/src/shell.h b/src/elements.h
similarity index 60%
copy from src/shell.h
copy to src/elements.h
index ca510408cccde4a8cfe31e7f5bcfd15798695622..b552286f0804798b9e3b35099d92fe56eb00391d 100644
--- a/src/shell.h
+++ b/src/elements.h
@@ -1,4 +1,4 @@
-// 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:
@@ -24,32 +24,43 @@
 // 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_