[compiler] Remove compiler internals from CodeAssembler.

test/unittests/interpreter/interpreter-assembler-unittest.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_UNITTESTS_INTERPRETER_INTERPRETER_ASSEMBLER_UNITTEST_H_
 #define V8_UNITTESTS_INTERPRETER_INTERPRETER_ASSEMBLER_UNITTEST_H_
 
 #include "src/compiler/machine-operator.h"
 #include "src/interpreter/interpreter-assembler.h"
 #include "test/unittests/test-utils.h"
@@ skipping 34 matching lines @@
     Matcher<compiler::Node*> IsUnsignedShortOperand(int offset);
     Matcher<compiler::Node*> IsSignedShortOperand(int offset);
     Matcher<compiler::Node*> IsUnsignedQuadOperand(int offset);
     Matcher<compiler::Node*> IsSignedQuadOperand(int offset);
 
     Matcher<compiler::Node*> IsSignedOperand(int offset,
                                              OperandSize operand_size);
     Matcher<compiler::Node*> IsUnsignedOperand(int offset,
                                                OperandSize operand_size);
 
-    using InterpreterAssembler::graph;
-
    private:
     DISALLOW_COPY_AND_ASSIGN(InterpreterAssemblerForTest);
   };
 };
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_UNITTESTS_INTERPRETER_INTERPRETER_ASSEMBLER_UNITTEST_H_