[presubmit] Enable readability/namespace linter checking.

src/ic/access-compiler.h

 // Copyright 2014 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_IC_ACCESS_COMPILER_H_
 #define V8_IC_ACCESS_COMPILER_H_
 
 #include "src/code-stubs.h"
 #include "src/macro-assembler.h"
 #include "src/objects.h"
@@ skipping 63 matching lines @@
 
  private:
   Code::Kind kind_;
   CacheHolderFlag cache_holder_;
 
   Isolate* isolate_;
   MacroAssembler masm_;
   // Ensure that MacroAssembler has a reasonable size.
   STATIC_ASSERT(sizeof(MacroAssembler) < 128 * kPointerSize);
 };
-}
-}  // namespace v8::internal
+}  // namespace internal
+}  // namespace v8
 
 #endif  // V8_IC_ACCESS_COMPILER_H_