[presubmit] Enable readability/namespace linter checking.

src/ic/call-optimization.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_CALL_OPTIMIZATION_H_
 #define V8_IC_CALL_OPTIMIZATION_H_
 
 #include "src/code-stubs.h"
 #include "src/ic/access-compiler.h"
 #include "src/macro-assembler.h"
@@ skipping 43 matching lines @@
 
   // Determines whether the given function can be called using the
   // fast api call builtin.
   void AnalyzePossibleApiFunction(Handle<JSFunction> function);
 
   Handle<JSFunction> constant_function_;
   bool is_simple_api_call_;
   Handle<FunctionTemplateInfo> expected_receiver_type_;
   Handle<CallHandlerInfo> api_call_info_;
 };
-}
-}  // namespace v8::internal
+}  // namespace internal
+}  // namespace v8
 
 #endif  // V8_IC_CALL_OPTIMIZATION_H_