Unify JSEntryStub and JSConstructEntryStub, and some more code stub cleanups.

src/ia32/code-stubs-ia32.cc

Index: src/ia32/code-stubs-ia32.cc
diff --git a/src/ia32/code-stubs-ia32.cc b/src/ia32/code-stubs-ia32.cc
index ad9d4799196f3cfeecba6729dd60eecfff77e6d0..11065ec94797aac3621c55fbb7541e473d71f426 100644
--- a/src/ia32/code-stubs-ia32.cc
+++ b/src/ia32/code-stubs-ia32.cc
@@ -2398,7 +2398,7 @@ void CEntryStub::Generate(MacroAssembler* masm) {
 }
 
 
-void JSEntryStub::GenerateBody(MacroAssembler* masm, bool is_construct) {
+void JSEntryStub::Generate(MacroAssembler* masm) {
   Label invoke, handler_entry, exit;
   Label not_outermost_js, not_outermost_js_2;
 
@@ -2409,7 +2409,7 @@ void JSEntryStub::GenerateBody(MacroAssembler* masm, bool is_construct) {
   __ mov(ebp, esp);
 
   // Push marker in two places.
-  int marker = is_construct ? StackFrame::ENTRY_CONSTRUCT : StackFrame::ENTRY;
+  int marker = type();
   __ push(Immediate(Smi::FromInt(marker)));  // context slot
   __ push(Immediate(Smi::FromInt(marker)));  // function slot
   // Save callee-saved registers (C calling conventions).
@@ -2460,7 +2460,7 @@ void JSEntryStub::GenerateBody(MacroAssembler* masm, bool is_construct) {
   // pop the faked function when we return. Notice that we cannot store a
   // reference to the trampoline code directly in this stub, because the
   // builtin stubs may not have been generated yet.
-  if (is_construct) {
+  if (type() == StackFrame::ENTRY_CONSTRUCT) {
     ExternalReference construct_entry(Builtins::kJSConstructEntryTrampoline,
                                       isolate());
     __ mov(edx, Immediate(construct_entry));