Avoid one repeated property lookup when computing store ICs.

src/stub-cache.cc

Index: src/stub-cache.cc
diff --git a/src/stub-cache.cc b/src/stub-cache.cc
index 4a7a7a69a0802f1c105818029846144fec3d1e11..98547e7174adc6f5cadb463167f8d1ab26910abf 100644
--- a/src/stub-cache.cc
+++ b/src/stub-cache.cc
@@ -1007,8 +1007,8 @@ Handle<Code> NamedStoreHandlerCompiler::CompileStoreTransition(
 }
 
 
-Handle<Code> NamedStoreHandlerCompiler::CompileStoreField(LookupResult* lookup,
-                                                          Handle<Name> name) {
+Handle<Code> NamedStoreHandlerCompiler::CompileStoreField(
+    LookupIterator* lookup, Handle<Name> name) {
   Label miss;
   GenerateStoreField(lookup, value(), &miss);
   __ bind(&miss);