Support optimization of named function literals.

src/ia32/lithium-ia32.h

Index: src/ia32/lithium-ia32.h
diff --git a/src/ia32/lithium-ia32.h b/src/ia32/lithium-ia32.h
index 5904791e5f22448168874ff83e972d6034dc3e8a..37f87cde4fda0ac227797afa5c8975d5497957ce 100644
--- a/src/ia32/lithium-ia32.h
+++ b/src/ia32/lithium-ia32.h
@@ -163,6 +163,7 @@ class LCodeGen;
   V(StringLength)                               \
   V(SubI)                                       \
   V(TaggedToI)                                  \
+  V(ThisFunction)                               \
   V(Throw)                                      \
   V(ToFastProperties)                           \
   V(Typeof)                                     \
@@ -1471,6 +1472,11 @@ class LPushArgument: public LTemplateInstruction<0, 1, 0> {
 };
 
 
+class LThisFunction: public LTemplateInstruction<1, 0, 0> {
+  DECLARE_CONCRETE_INSTRUCTION(ThisFunction, "this-function")
+};
+
+
 class LContext: public LTemplateInstruction<1, 0, 0> {
  public:
   DECLARE_CONCRETE_INSTRUCTION(Context, "context")