[cleanup] Mark interpreter methods in subclasses with override.

Fixing clang-tidy warning.

Bug: v8:8015
Change-Id: Ibc3dedb0bce78ddce4004ee386757ce504bb073a
Reviewed-on: https://chromium-review.googlesource.com/1226792
Commit-Queue: Florian Sattler <sattlerf@google.com>
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#55931}

src/interpreter/bytecode-generator.cc

@@ -402,7 +402,7 @@ class BytecodeGenerator::ControlScopeForIteration final
         loop_builder_(loop_builder) {
     generator->loop_depth_++;
   }
-  ~ControlScopeForIteration() { generator()->loop_depth_--; }
+  ~ControlScopeForIteration() override { generator()->loop_depth_--; }
 
  protected:
   bool Execute(Command command, Statement* statement,

src/interpreter/bytecode-register-optimizer.h

@@ -39,7 +39,7 @@ class V8_EXPORT_PRIVATE BytecodeRegisterOptimizer final
                             BytecodeRegisterAllocator* register_allocator,
                             int fixed_registers_count, int parameter_count,
                             BytecodeWriter* bytecode_writer);
-  virtual ~BytecodeRegisterOptimizer() = default;
+  ~BytecodeRegisterOptimizer() override = default;
 
   // Perform explicit register transfer operations.
   void DoLdar(Register input) {

src/interpreter/control-flow-builders.h

@@ -41,7 +41,7 @@ class V8_EXPORT_PRIVATE BreakableControlFlowBuilder
         break_labels_(builder->zone()),
         node_(node),
         block_coverage_builder_(block_coverage_builder) {}
-  virtual ~BreakableControlFlowBuilder();
+  ~BreakableControlFlowBuilder() override;
 
   // This method is called when visiting break statements in the AST.
   // Inserts a jump to an unbound label that is patched when the corresponding
@@ -113,7 +113,7 @@ class V8_EXPORT_PRIVATE LoopBuilder final : public BreakableControlFlowBuilder {
               node, SourceRangeKind::kBody);
     }
   }
-  ~LoopBuilder();
+  ~LoopBuilder() override;
 
   void LoopHeader();
   void LoopBody();
@@ -149,7 +149,7 @@ class V8_EXPORT_PRIVATE SwitchBuilder final
         case_sites_(builder->zone()) {
     case_sites_.resize(number_of_cases);
   }
-  ~SwitchBuilder();
+  ~SwitchBuilder() override;
 
   // This method should be called by the SwitchBuilder owner when the case
   // statement with |index| is emitted to update the case jump site.
@@ -186,7 +186,7 @@ class V8_EXPORT_PRIVATE TryCatchBuilder final : public ControlFlowBuilder {
         block_coverage_builder_(block_coverage_builder),
         statement_(statement) {}
 
-  ~TryCatchBuilder();
+  ~TryCatchBuilder() override;
 
   void BeginTry(Register context);
   void EndTry();
@@ -217,7 +217,7 @@ class V8_EXPORT_PRIVATE TryFinallyBuilder final : public ControlFlowBuilder {
         block_coverage_builder_(block_coverage_builder),
         statement_(statement) {}
 
-  ~TryFinallyBuilder();
+  ~TryFinallyBuilder() override;
 
   void BeginTry(Register context);
   void LeaveTry();
@@ -260,7 +260,7 @@ class V8_EXPORT_PRIVATE ConditionalControlFlowBuilder final
               node, SourceRangeKind::kElse);
     }
   }
-  ~ConditionalControlFlowBuilder();
+  ~ConditionalControlFlowBuilder() override;
 
   BytecodeLabels* then_labels() { return &then_labels_; }
   BytecodeLabels* else_labels() { return &else_labels_; }