[Interpreter] Add support for break statements in labelled blocks.

src/interpreter/bytecode-generator.h

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_INTERPRETER_BYTECODE_GENERATOR_H_
 #define V8_INTERPRETER_BYTECODE_GENERATOR_H_
 
 #include "src/ast/ast.h"
 #include "src/interpreter/bytecode-array-builder.h"
 #include "src/interpreter/bytecodes.h"
@@ skipping 11 matching lines @@
 #define DECLARE_VISIT(type) void Visit##type(type* node) override;
   AST_NODE_LIST(DECLARE_VISIT)
 #undef DECLARE_VISIT
 
   // Visiting function for declarations list is overridden.
   void VisitDeclarations(ZoneList<Declaration*>* declarations) override;
 
  private:
   class ContextScope;
   class ControlScope;
+  class ControlScopeForBreakable;
   class ControlScopeForIteration;
-  class ControlScopeForSwitch;
   class ExpressionResultScope;
   class EffectResultScope;
   class AccumulatorResultScope;
   class RegisterResultScope;
   class AssignmentHazardScope;
 
   // Helper class that aliases locals and parameters when assignment
   // hazards occur in binary expressions. For y = x + (x = 1) has an
   // assignment hazard because the lhs evaluates to the register
   // holding x and the rhs (x = 1) potentially updates x. When this
@@ skipping 124 matching lines @@
   ContextScope* execution_context_;
   ExpressionResultScope* execution_result_;
   AssignmentHazardHelper assignment_hazard_helper_;
 };
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_INTERPRETER_BYTECODE_GENERATOR_H_