Revert r14930 and r14935 temporarily.

src/x64/lithium-x64.h

Index: src/x64/lithium-x64.h
diff --git a/src/x64/lithium-x64.h b/src/x64/lithium-x64.h
index cc7338261451e7f6d7f592542a3b2180dfdbdf60..94efc29c1548dd9c9abdc2785bbaa00cca6e82b3 100644
--- a/src/x64/lithium-x64.h
+++ b/src/x64/lithium-x64.h
@@ -50,6 +50,7 @@ class LCodeGen;
   V(AccessArgumentsAt)                          \
   V(AddI)                                       \
   V(Allocate)                                   \
+  V(AllocateObject)                             \
   V(ApplyArguments)                             \
   V(ArgumentsElements)                          \
   V(ArgumentsLength)                            \
@@ -2362,6 +2363,19 @@ class LCheckNonSmi: public LTemplateInstruction<0, 1, 0> {
 };
 
 
+class LAllocateObject: public LTemplateInstruction<1, 0, 1> {
+ public:
+  explicit LAllocateObject(LOperand* temp) {
+    temps_[0] = temp;
+  }
+
+  LOperand* temp() { return temps_[0]; }
+
+  DECLARE_CONCRETE_INSTRUCTION(AllocateObject, "allocate-object")
+  DECLARE_HYDROGEN_ACCESSOR(AllocateObject)
+};
+
+
 class LAllocate: public LTemplateInstruction<1, 1, 1> {
  public:
   LAllocate(LOperand* size, LOperand* temp) {