[type-profile] Handle returns correctly.

src/feedback-vector.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/feedback-vector.h"
 #include "src/code-stubs.h"
 #include "src/feedback-vector-inl.h"
 #include "src/ic/ic-inl.h"
 #include "src/ic/ic-state.h"
 #include "src/objects.h"
@@ skipping 159 matching lines @@
     }
   }
   return false;
 }
 
 FeedbackSlotKind FeedbackVector::GetKind(FeedbackSlot slot) const {
   DCHECK(!is_empty());
   return metadata()->GetKind(slot);
 }
 
+FeedbackSlot FeedbackVector::GetTypeProfileSlot() const {
+  FeedbackMetadataIterator iter(metadata());
+  while (iter.HasNext()) {
+    FeedbackSlot slot = iter.Next();
+    if (IsTypeProfile(slot)) {
+      return slot;
+    }
+  }
+  return FeedbackSlot();
+}
+
 // static
 Handle<FeedbackVector> FeedbackVector::New(Isolate* isolate,
                                            Handle<SharedFunctionInfo> shared) {
   Factory* factory = isolate->factory();
 
   const int slot_count = shared->feedback_metadata()->slot_count();
   const int length = slot_count + kReservedIndexCount;
 
   Handle<FixedArray> array = factory->NewFixedArray(length, TENURED);
   array->set_map_no_write_barrier(isolate->heap()->feedback_vector_map());
@@ skipping 897 matching lines @@
     Handle<Tuple2> entry = Handle<Tuple2>::cast(maybe_entry);
     Handle<String> type =
         Handle<String>(String::cast(entry->value1()), isolate);
     int position = Smi::cast(entry->value2())->value();
     PrintF("%d: %s\n", position, type->ToCString().get());
   }
 }
 
 }  // namespace internal
 }  // namespace v8