Implement inlining of constructor calls.

src/heap.h

Index: src/heap.h
diff --git a/src/heap.h b/src/heap.h
index e9cbb52ba94e654270ce59b6b99f81420b76a839..03ee7114128679bc02627fb2159549697fb6fbaa 100644
--- a/src/heap.h
+++ b/src/heap.h
@@ -150,7 +150,8 @@ namespace internal {
   V(Script, empty_script, EmptyScript)                                         \
   V(Smi, real_stack_limit, RealStackLimit)                                     \
   V(StringDictionary, intrinsic_function_names, IntrinsicFunctionNames)        \
-  V(Smi, arguments_adaptor_deopt_pc_offset, ArgumentsAdaptorDeoptPCOffset)
+  V(Smi, arguments_adaptor_deopt_pc_offset, ArgumentsAdaptorDeoptPCOffset)     \
+  V(Smi, construct_stub_deopt_pc_offset, ConstructStubDeoptPCOffset)
 
 #define ROOT_LIST(V)                                  \
   STRONG_ROOT_LIST(V)                                 \
@@ -1555,6 +1556,11 @@ class Heap {
     set_arguments_adaptor_deopt_pc_offset(Smi::FromInt(pc_offset));
   }
 
+  void SetConstructStubDeoptPCOffset(int pc_offset) {
+    ASSERT(construct_stub_deopt_pc_offset() == Smi::FromInt(0));
+    set_construct_stub_deopt_pc_offset(Smi::FromInt(pc_offset));
+  }
+
  private:
   Heap();