Don't call FastNewFunctionContextStub if context is bigger than kMaxRegularHeapObjectSize.

src/crankshaft/ia32/lithium-codegen-ia32.cc

Index: src/crankshaft/ia32/lithium-codegen-ia32.cc
diff --git a/src/crankshaft/ia32/lithium-codegen-ia32.cc b/src/crankshaft/ia32/lithium-codegen-ia32.cc
index 71a500034a917182e36c862bab714a7473a376d0..86d3bb6183257c5bcdd471c33e00afcad1750d76 100644
--- a/src/crankshaft/ia32/lithium-codegen-ia32.cc
+++ b/src/crankshaft/ia32/lithium-codegen-ia32.cc
@@ -176,12 +176,17 @@ void LCodeGen::DoPrologue(LPrologue* instr) {
       __ CallRuntime(Runtime::kNewScriptContext);
       deopt_mode = Safepoint::kLazyDeopt;
     } else {
-      FastNewFunctionContextStub stub(isolate());
-      __ mov(FastNewFunctionContextDescriptor::SlotsRegister(),
-             Immediate(slots));
-      __ CallStub(&stub);
-      // Result of FastNewFunctionContextStub is always in new space.
-      need_write_barrier = false;
+      if (slots <= FastNewFunctionContextStub::kMaximumSlots) {
+        FastNewFunctionContextStub stub(isolate());
+        __ mov(FastNewFunctionContextDescriptor::SlotsRegister(),
+               Immediate(slots));
+        __ CallStub(&stub);
+        // Result of FastNewFunctionContextStub is always in new space.
+        need_write_barrier = false;
+      } else {
+        __ push(edi);
+        __ CallRuntime(Runtime::kNewFunctionContext);
+      }
     }
     RecordSafepoint(deopt_mode);