Replaced LookupResult::IsProperty by LookupResult::IsFound where possible.

src/stub-cache.cc

Index: src/stub-cache.cc
diff --git a/src/stub-cache.cc b/src/stub-cache.cc
index ec8f6bdf25b949d8c962788f9ed87fd762ed9d07..c7f4f9438602ac44dee8de379b6ee1f1265f92b0 100644
--- a/src/stub-cache.cc
+++ b/src/stub-cache.cc
@@ -1452,13 +1452,13 @@ Handle<Code> ConstructStubCompiler::GetCode() {
 
 
 CallOptimization::CallOptimization(LookupResult* lookup) {
-  if (!lookup->IsProperty() ||
-      !lookup->IsCacheable() ||
-      lookup->type() != CONSTANT_FUNCTION) {
-    Initialize(Handle<JSFunction>::null());
-  } else {
+  if (lookup->IsFound() &&
+      lookup->IsCacheable() &&
+      lookup->type() == CONSTANT_FUNCTION) {
     // We only optimize constant function calls.
     Initialize(Handle<JSFunction>(lookup->GetConstantFunction()));
+  } else {
+    Initialize(Handle<JSFunction>::null());
   }
 }