[turbofan] Cleanup use of virtual, OVERRIDE, FINAL.

src/compiler/control-builders.h

Index: src/compiler/control-builders.h
diff --git a/src/compiler/control-builders.h b/src/compiler/control-builders.h
index 1349cbac1e962bc132dc430f28d9cfa0bc4cc06e..11adfdb0f4027637465d33db1326c2b1f965dc50 100644
--- a/src/compiler/control-builders.h
+++ b/src/compiler/control-builders.h
@@ -40,7 +40,7 @@ class ControlBuilder {
 
 
 // Tracks control flow for a conditional statement.
-class IfBuilder : public ControlBuilder {
+class IfBuilder FINAL : public ControlBuilder {
  public:
   explicit IfBuilder(StructuredGraphBuilder* builder)
       : ControlBuilder(builder),
@@ -60,7 +60,7 @@ class IfBuilder : public ControlBuilder {
 
 
 // Tracks control flow for an iteration statement.
-class LoopBuilder : public ControlBuilder {
+class LoopBuilder FINAL : public ControlBuilder {
  public:
   explicit LoopBuilder(StructuredGraphBuilder* builder)
       : ControlBuilder(builder),
@@ -74,8 +74,8 @@ class LoopBuilder : public ControlBuilder {
   void EndLoop();
 
   // Primitive support for break and continue.
-  virtual void Continue();
-  virtual void Break();
+  void Continue() FINAL;
+  void Break() FINAL;
 
   // Compound control command for conditional break.
   void BreakUnless(Node* condition);
@@ -88,7 +88,7 @@ class LoopBuilder : public ControlBuilder {
 
 
 // Tracks control flow for a switch statement.
-class SwitchBuilder : public ControlBuilder {
+class SwitchBuilder FINAL : public ControlBuilder {
  public:
   explicit SwitchBuilder(StructuredGraphBuilder* builder, int case_count)
       : ControlBuilder(builder),
@@ -107,7 +107,7 @@ class SwitchBuilder : public ControlBuilder {
   void EndSwitch();
 
   // Primitive support for break.
-  virtual void Break();
+  void Break() FINAL;
 
   // The number of cases within a switch is statically known.
   size_t case_count() const { return body_environments_.size(); }
@@ -121,7 +121,7 @@ class SwitchBuilder : public ControlBuilder {
 
 
 // Tracks control flow for a block statement.
-class BlockBuilder : public ControlBuilder {
+class BlockBuilder FINAL : public ControlBuilder {
  public:
   explicit BlockBuilder(StructuredGraphBuilder* builder)
       : ControlBuilder(builder), break_environment_(NULL) {}
@@ -131,13 +131,14 @@ class BlockBuilder : public ControlBuilder {
   void EndBlock();
 
   // Primitive support for break.
-  virtual void Break();
+  void Break() FINAL;
 
  private:
   Environment* break_environment_;  // Environment after the block exits.
 };
-}
-}
-}  // namespace v8::internal::compiler
+
+}  // namespace compiler
+}  // namespace internal
+}  // namespace v8
 
 #endif  // V8_COMPILER_CONTROL_BUILDERS_H_