Remove obsolete instruction HOuterContext.

src/hydrogen-instructions.h

Index: src/hydrogen-instructions.h
diff --git a/src/hydrogen-instructions.h b/src/hydrogen-instructions.h
index dbf61835f8c2c76fd1b01fbc3e7a64a9f6e32cc3..138c617e17e15547ad01055c72816d54ec62171a 100644
--- a/src/hydrogen-instructions.h
+++ b/src/hydrogen-instructions.h
@@ -149,7 +149,6 @@ class LChunkBuilder;
   V(Mod)                                       \
   V(Mul)                                       \
   V(OsrEntry)                                  \
-  V(OuterContext)                              \
   V(Parameter)                                 \
   V(Power)                                     \
   V(PushArgument)                              \
@@ -2126,29 +2125,6 @@ class HThisFunction V8_FINAL : public HTemplateInstruction<0> {
 };
 
 
-class HOuterContext V8_FINAL : public HUnaryOperation {
- public:
-  DECLARE_INSTRUCTION_FACTORY_P1(HOuterContext, HValue*);
-
-  DECLARE_CONCRETE_INSTRUCTION(OuterContext);
-
-  virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE {
-    return Representation::Tagged();
-  }
-
- protected:
-  virtual bool DataEquals(HValue* other) V8_OVERRIDE { return true; }
-
- private:
-  explicit HOuterContext(HValue* inner) : HUnaryOperation(inner) {
-    set_representation(Representation::Tagged());
-    SetFlag(kUseGVN);
-  }
-
-  virtual bool IsDeletable() const V8_OVERRIDE { return true; }
-};
-
-
 class HDeclareGlobals V8_FINAL : public HUnaryOperation {
  public:
   DECLARE_INSTRUCTION_WITH_CONTEXT_FACTORY_P2(HDeclareGlobals,