[compiler] Remove compiler internals from CodeAssembler.

test/cctest/compiler/code-assembler-tester.h

 // Copyright 2016 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.
 
 #include "src/handles.h"
 #include "src/interface-descriptors.h"
 #include "src/isolate.h"
 #include "test/cctest/compiler/function-tester.h"
 
 namespace v8 {
@@ skipping 33 matching lines @@
   // specific flags.
   CodeAssemblerTesterImpl(Isolate* isolate, Code::Flags flags)
       : ZoneHolder(isolate),
         CodeAssemblerT(isolate, ZoneHolder::zone(), 0, flags, "test"),
         scope_(isolate) {}
 
   Handle<Code> GenerateCodeCloseAndEscape() {
     return scope_.CloseAndEscape(CodeAssemblerT::GenerateCode());
   }
 
-  // Expose some internal methods.
-
-  Node* SmiShiftBitsConstant() {
-    return CodeAssemblerT::SmiShiftBitsConstant();
-  }
-
  private:
   HandleScope scope_;
   LocalContext context_;
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8