Remove some "namespace" classes from C++ Kernel

runtime/vm/kernel_to_il.h

 // Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef RUNTIME_VM_KERNEL_TO_IL_H_
 #define RUNTIME_VM_KERNEL_TO_IL_H_
 
 #if !defined(DART_PRECOMPILED_RUNTIME)
 
 #include "vm/growable_array.h"
@@ skipping 594 matching lines @@
 
   dart::RawFunction* LookupMethodByMember(NameIndex target,
                                           const dart::String& method_name);
 
   LocalVariable* MakeTemporary();
   LocalVariable* MakeNonTemporary(const dart::String& symbol);
 
   intptr_t CurrentTryIndex();
   intptr_t AllocateTryIndex() { return next_used_try_index_++; }
 
-  dart::LocalVariable* LookupVariable(VariableDeclaration* var);
   dart::LocalVariable* LookupVariable(intptr_t kernel_offset);
 
   void SetTempIndex(Definition* definition);
 
   void Push(Definition* definition);
   Value* Pop();
   Fragment Drop();
 
   bool IsInlining() { return exit_collector_ != NULL; }
 
@@ skipping 317 matching lines @@
 namespace kernel {
 
 RawObject* EvaluateMetadata(const dart::Field& metadata_field);
 RawObject* BuildParameterDescriptor(const Function& function);
 
 }  // namespace kernel
 }  // namespace dart
 
 #endif  // !defined(DART_PRECOMPILED_RUNTIME)
 #endif  // RUNTIME_VM_KERNEL_TO_IL_H_