Enable preaging of code objects when --optimize-for-size.

src/ia32/lithium-codegen-ia32.cc

Index: src/ia32/lithium-codegen-ia32.cc
diff --git a/src/ia32/lithium-codegen-ia32.cc b/src/ia32/lithium-codegen-ia32.cc
index d119111138a2f40eb7036f7321be2102be003429..91b26fd593b52262144f679003010a3b352d5d4a 100644
--- a/src/ia32/lithium-codegen-ia32.cc
+++ b/src/ia32/lithium-codegen-ia32.cc
@@ -209,7 +209,15 @@ bool LCodeGen::GeneratePrologue() {
     __ push(ebp);  // Caller's frame pointer.
     __ mov(ebp, esp);
     info()->AddNoFrameRange(0, masm_->pc_offset());
-    __ push(esi);  // Callee's context.
+    if (isolate()->is_memory_constrained()) {
+      // This sequence marks pre-aged code.
+      __ push(esi);  // Callee's context.
+      __ nop();
+    } else {
+      // This sequence marks non-aged code.
+      __ nop();
+      __ push(esi);  // Callee's context
+    }
     if (info()->IsStub()) {
       __ push(Immediate(Smi::FromInt(StackFrame::STUB)));
     } else {