[interpreter] Simplify ConstantArrayBuilder interface a bit.

test/unittests/interpreter/constant-array-builder-unittest.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/factory.h"
 #include "src/handles-inl.h"
 #include "src/interpreter/constant-array-builder.h"
 #include "src/isolate.h"
@@ skipping 140 matching lines @@
 
 
 TEST_F(ConstantArrayBuilderTest, ToFixedArray) {
   ConstantArrayBuilder builder(isolate(), zone());
   static const size_t kNumberOfElements = 37;
   for (size_t i = 0; i < kNumberOfElements; i++) {
     Handle<Object> object = isolate()->factory()->NewNumberFromSize(i);
     builder.Insert(object);
     CHECK(builder.At(i)->SameValue(*object));
   }
-  Handle<FixedArray> constant_array =
-      builder.ToFixedArray(isolate()->factory());
+  Handle<FixedArray> constant_array = builder.ToFixedArray();
   CHECK_EQ(constant_array->length(), kNumberOfElements);
   for (size_t i = 0; i < kNumberOfElements; i++) {
     CHECK(constant_array->get(static_cast<int>(i))->SameValue(*builder.At(i)));
   }
 }
 
 
 TEST_F(ConstantArrayBuilderTest, GapFilledWhenLowReservationCommitted) {
   ConstantArrayBuilder builder(isolate(), zone());
   for (size_t i = 0; i < kLowCapacity; i++) {
@@ skipping 43 matching lines @@
     Handle<Object> original = builder.At(kLowCapacity + i);
     CHECK(original->SameValue(*reference));
     Handle<Object> duplicate = builder.At(i);
     CHECK(duplicate->SameValue(*isolate()->factory()->the_hole_value()));
   }
 }
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8