Make RawMachineAssemblerTest emitting CFG always have a dummy End block

src/compiler/raw-machine-assembler.cc

Index: src/compiler/raw-machine-assembler.cc
diff --git a/src/compiler/raw-machine-assembler.cc b/src/compiler/raw-machine-assembler.cc
index 6a339e7c918d0c60350c847e483209f7865daf53..996f2b95f4760a159f50d0b880bcbd40e1ea9bba 100644
--- a/src/compiler/raw-machine-assembler.cc
+++ b/src/compiler/raw-machine-assembler.cc
@@ -23,7 +23,6 @@ RawMachineAssembler::RawMachineAssembler(Isolate* isolate, Graph* graph,
       call_descriptor_(
           Linkage::GetSimplifiedCDescriptor(graph->zone(), machine_sig)),
       parameters_(NULL),
-      exit_label_(schedule()->end()),
       current_block_(schedule()->start()) {
   int param_count = static_cast<int>(parameter_count());
   Node* s = graph->NewNode(common_.Start(param_count));
@@ -54,12 +53,6 @@ Node* RawMachineAssembler::Parameter(size_t index) {
 }
 
 
-RawMachineAssembler::Label* RawMachineAssembler::Exit() {
-  exit_label_.used_ = true;
-  return &exit_label_;
-}
-
-
 void RawMachineAssembler::Goto(Label* label) {
   DCHECK(current_block_ != schedule()->end());
   schedule()->AddGoto(CurrentBlock(), Use(label));