[presubmit] Enable readability/namespace linter checking.

src/typing-asm.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_TYPING_ASM_H_
 #define V8_TYPING_ASM_H_
 
 #include "src/allocation.h"
 #include "src/ast.h"
 #include "src/effects.h"
@@ skipping 71 matching lines @@
 
   void VisitWithExpectation(Expression* expr, Type* expected_type,
                             const char* msg);
 
 #define DECLARE_VISIT(type) virtual void Visit##type(type* node) override;
   AST_NODE_LIST(DECLARE_VISIT)
 #undef DECLARE_VISIT
 
   DISALLOW_COPY_AND_ASSIGN(AsmTyper);
 };
-}
-}  // namespace v8::internal
+}  // namespace internal
+}  // namespace v8
 
 #endif  // V8_TYPING_ASM_H_