[presubmit] Enable readability/namespace linter checking.

src/full-codegen/full-codegen.h

 // Copyright 2012 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_FULL_CODEGEN_FULL_CODEGEN_H_
 #define V8_FULL_CODEGEN_FULL_CODEGEN_H_
 
 #include "src/allocation.h"
 #include "src/assert-scope.h"
 #include "src/ast.h"
@@ skipping 1063 matching lines @@
   static const int kPcOffsetOffset = 1 * kIntSize;
   static const int kLoopDepthOffset = 2 * kIntSize;
   static const int kEntrySize = 3 * kIntSize;
 
   Address start_;
   Address instruction_start_;
   uint32_t length_;
 };
 
 
-} }  // namespace v8::internal
+}  // namespace internal
+}  // namespace v8
 
 #endif  // V8_FULL_CODEGEN_FULL_CODEGEN_H_