Support inlining at call-sites with mismatched number of arguments.

src/hydrogen-instructions.h

Index: src/hydrogen-instructions.h
diff --git a/src/hydrogen-instructions.h b/src/hydrogen-instructions.h
index 9f661d6f0327646496eecb03a23dd15b229d9032..bdafb3ed681e0cba5b530e1f8d283d9ef57e5cc7 100644
--- a/src/hydrogen-instructions.h
+++ b/src/hydrogen-instructions.h
@@ -1340,9 +1340,11 @@ class HStackCheck: public HTemplateInstruction<1> {
 class HEnterInlined: public HTemplateInstruction<0> {
  public:
   HEnterInlined(Handle<JSFunction> closure,
+                int arguments_count,
                 FunctionLiteral* function,
                 CallKind call_kind)
       : closure_(closure),
+        arguments_count_(arguments_count),
         function_(function),
         call_kind_(call_kind) {
   }
@@ -1350,6 +1352,7 @@ class HEnterInlined: public HTemplateInstruction<0> {
   virtual void PrintDataTo(StringStream* stream);
 
   Handle<JSFunction> closure() const { return closure_; }
+  int arguments_count() const { return arguments_count_; }
   FunctionLiteral* function() const { return function_; }
   CallKind call_kind() const { return call_kind_; }
 
@@ -1361,6 +1364,7 @@ class HEnterInlined: public HTemplateInstruction<0> {
 
  private:
   Handle<JSFunction> closure_;
+  int arguments_count_;
   FunctionLiteral* function_;
   CallKind call_kind_;
 };