[presubmit] Enable readability/namespace linter checking.

src/profiler/profile-generator.h

Index: src/profiler/profile-generator.h
diff --git a/src/profiler/profile-generator.h b/src/profiler/profile-generator.h
index ce58d70ae9c656471fb53599053a7346df8c97be..cd79dfa97975f9bf9920ddfa476d6fefce2d1a34 100644
--- a/src/profiler/profile-generator.h
+++ b/src/profiler/profile-generator.h
@@ -383,6 +383,7 @@ class ProfileGenerator {
 };
 
 
-} }  // namespace v8::internal
+}  // namespace internal
+}  // namespace v8
 
 #endif  // V8_PROFILER_PROFILE_GENERATOR_H_