[Isolates] Merge crankshaft (r5922 from bleeding_edge).

src/variables.cc

Index: src/variables.cc
diff --git a/src/variables.cc b/src/variables.cc
index 504e2244234d5e4746a4147223541aa9acace82c..c1440b7f6fd0564780499a46bde1626cd071d366 100644
--- a/src/variables.cc
+++ b/src/variables.cc
@@ -86,6 +86,18 @@ bool Variable::IsStackAllocated() const {
 }
 
 
+bool Variable::IsParameter() const {
+  Slot* s = AsSlot();
+  return s != NULL && s->type() == Slot::PARAMETER;
+}
+
+
+bool Variable::IsStackLocal() const {
+  Slot* s = AsSlot();
+  return s != NULL && s->type() == Slot::LOCAL;
+}
+
+
 Variable::Variable(Scope* scope,
                    Handle<String> name,
                    Mode mode,