Ensure hole checks take place in switch statement scopes

src/full-codegen/full-codegen.h

 // Copyright 2012 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_FULL_CODEGEN_FULL_CODEGEN_H_
 #define V8_FULL_CODEGEN_FULL_CODEGEN_H_
 
 #include "src/allocation.h"
 #include "src/assert-scope.h"
 #include "src/ast.h"
@@ skipping 533 matching lines @@
                                      TypeofMode typeof_mode, Label* slow);
   MemOperand ContextSlotOperandCheckExtensions(Variable* var, Label* slow);
   void EmitDynamicLookupFastCase(VariableProxy* proxy, TypeofMode typeof_mode,
                                  Label* slow, Label* done);
   void EmitGlobalVariableLoad(VariableProxy* proxy, TypeofMode typeof_mode);
   void EmitVariableLoad(VariableProxy* proxy,
                         TypeofMode typeof_mode = NOT_INSIDE_TYPEOF);
 
   void EmitAccessor(Expression* expression);
 
+  bool NeedsHoleCheckForLoad(VariableProxy* proxy);
+
   // Expects the arguments and the function already pushed.
   void EmitResolvePossiblyDirectEval(int arg_count);
 
   // Platform-specific support for allocating a new closure based on
   // the given function info.
   void EmitNewClosure(Handle<SharedFunctionInfo> info, bool pretenure);
 
   // Re-usable portions of CallRuntime
   void EmitLoadJSRuntimeFunction(CallRuntime* expr);
   void EmitCallJSRuntimeFunction(CallRuntime* expr);
@@ skipping 513 matching lines @@
 
   Address start_;
   Address instruction_start_;
   uint32_t length_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_FULL_CODEGEN_FULL_CODEGEN_H_