Refactor dependent code.

src/crankshaft/lithium.cc

 // Copyright 2012 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/crankshaft/lithium.h"
 
 #include "src/scopes.h"
 
 #if V8_TARGET_ARCH_IA32
 #include "src/crankshaft/ia32/lithium-ia32.h"  // NOLINT
@@ skipping 423 matching lines @@
         Handle<Map> map(Map::cast(it.rinfo()->target_object()));
         maps.Add(map, zone());
       } else {
         Handle<HeapObject> object(
             HeapObject::cast(it.rinfo()->target_object()));
         objects.Add(object, zone());
       }
     }
   }
   for (int i = 0; i < maps.length(); i++) {
-    if (maps.at(i)->dependent_code()->number_of_entries(
-            DependentCode::kWeakCodeGroup) == 0) {
+    if (maps.at(i)->dependent_code()->IsEmpty(DependentCode::kWeakCodeGroup)) {
       isolate()->heap()->AddRetainedMap(maps.at(i));
     }
     Map::AddDependentCode(maps.at(i), DependentCode::kWeakCodeGroup, code);
   }
   for (int i = 0; i < objects.length(); i++) {
     AddWeakObjectToCodeDependency(isolate(), objects.at(i), code);
   }
   code->set_can_have_weak_objects(true);
 }
 
@@ skipping 249 matching lines @@
 
 LPhase::~LPhase() {
   if (ShouldProduceTraceOutput()) {
     isolate()->GetHTracer()->TraceLithium(name(), chunk_);
   }
 }
 
 
 }  // namespace internal
 }  // namespace v8