[presubmit] Enable readability/namespace linter checking.

src/typing-reset.cc

 // 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.
 
 #include "src/v8.h"
 
 #include "src/typing-reset.h"
 
 #include "src/ast.h"
 #include "src/codegen.h"
 #include "src/scopes.h"
 
 namespace v8 {
 namespace internal {
 
 
 TypingReseter::TypingReseter(Isolate* isolate, Zone* zone,
                              FunctionLiteral* root)
     : AstExpressionVisitor(isolate, zone, root) {}
 
 
 void TypingReseter::VisitExpression(Expression* expression) {
   expression->set_bounds(Bounds::Unbounded());
 }
-}
-}  // namespace v8::internal
+}  // namespace internal
+}  // namespace v8