Introduce LookupIterator::PropertyOrElement which converts name to index if possible.

src/runtime/runtime-debug.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/v8.h"
 
 #include "src/accessors.h"
 #include "src/arguments.h"
 #include "src/compiler.h"
 #include "src/debug.h"
@@ skipping 288 matching lines @@
   // could have the assumption that its own native context is the current
   // context and not some internal debugger context.
   SaveContext save(isolate);
   if (isolate->debug()->in_debug_scope()) {
     isolate->set_context(*isolate->debug()->debugger_entry()->GetContext());
   }
 
   // Check if the name is trivially convertible to an index and get the element
   // if so.
   uint32_t index;
+  // TODO(verwaest): Make sure DebugGetProperty can handle arrays, and remove
+  // this special case.
   if (name->AsArrayIndex(&index)) {
     Handle<FixedArray> details = isolate->factory()->NewFixedArray(2);
     Handle<Object> element_or_char;
     ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
         isolate, element_or_char,
         Runtime::GetElementOrCharAt(isolate, obj, index));
     details->set(0, *element_or_char);
     details->set(1, PropertyDetails::Empty().AsSmi());
     return *isolate->factory()->NewJSArrayWithElements(details);
   }
@@ skipping 2859 matching lines @@
   return Smi::FromInt(isolate->debug()->is_active());
 }
 
 
 RUNTIME_FUNCTION(Runtime_DebugBreakInOptimizedCode) {
   UNIMPLEMENTED();
   return NULL;
 }
 }  // namespace internal
 }  // namespace v8