Crankshaft is now able to compile top level code even if there is a ScriptContext.

src/ia32/lithium-ia32.cc

Index: src/ia32/lithium-ia32.cc
diff --git a/src/ia32/lithium-ia32.cc b/src/ia32/lithium-ia32.cc
index 598170c3e528a03e16f2cef43a3a58b82f96fd29..cc4300592c0dd9b895656d3ad3929bc40226dfcd 100644
--- a/src/ia32/lithium-ia32.cc
+++ b/src/ia32/lithium-ia32.cc
@@ -955,7 +955,7 @@ void LChunkBuilder::AddInstruction(LInstruction* instr,
   }
   chunk_->AddInstruction(instr, current_block_);
 
-  if (instr->IsCall()) {
+  if (instr->IsCall() || instr->IsPrologue()) {
     HValue* hydrogen_value_for_lazy_bailout = hydrogen_val;
     if (hydrogen_val->HasObservableSideEffects()) {
       HSimulate* sim = HSimulate::cast(hydrogen_val->next());
@@ -969,6 +969,11 @@ void LChunkBuilder::AddInstruction(LInstruction* instr,
 }
 
 
+LInstruction* LChunkBuilder::DoPrologue(HPrologue* instr) {
+  return new (zone()) LPrologue();
+}
+
+
 LInstruction* LChunkBuilder::DoGoto(HGoto* instr) {
   return new(zone()) LGoto(instr->FirstSuccessor());
 }