MIPS: Replace LoadNamedFieldPolymorphic with explicit branches.

src/mips/lithium-mips.h

Index: src/mips/lithium-mips.h
diff --git a/src/mips/lithium-mips.h b/src/mips/lithium-mips.h
index 67866db8659bd3be88070a7387f45629d9167497..a1792b17b22bdd3924d3a371ce8dc4367ffc11d7 100644
--- a/src/mips/lithium-mips.h
+++ b/src/mips/lithium-mips.h
@@ -126,7 +126,6 @@ class LCodeGen;
   V(LoadKeyed)                                  \
   V(LoadKeyedGeneric)                           \
   V(LoadNamedField)                             \
-  V(LoadNamedFieldPolymorphic)                  \
   V(LoadNamedGeneric)                           \
   V(MapEnumLength)                              \
   V(MathAbs)                                    \
@@ -1505,19 +1504,6 @@ class LLoadNamedField: public LTemplateInstruction<1, 1, 0> {
 };
 
 
-class LLoadNamedFieldPolymorphic: public LTemplateInstruction<1, 1, 0> {
- public:
-  explicit LLoadNamedFieldPolymorphic(LOperand* object) {
-    inputs_[0] = object;
-  }
-
-  LOperand* object() { return inputs_[0]; }
-
-  DECLARE_CONCRETE_INSTRUCTION(LoadNamedField, "load-named-field-polymorphic")
-  DECLARE_HYDROGEN_ACCESSOR(LoadNamedFieldPolymorphic)
-};
-
-
 class LLoadNamedGeneric: public LTemplateInstruction<1, 1, 0> {
  public:
   explicit LLoadNamedGeneric(LOperand* object) {