[presubmit] Enable readability/namespace linter checking.

src/profiler/profile-generator-inl.h

 // Copyright 2010 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_PROFILER_PROFILE_GENERATOR_INL_H_
 #define V8_PROFILER_PROFILE_GENERATOR_INL_H_
 
 #include "src/profiler/profile-generator.h"
 
 namespace v8 {
@@ skipping 25 matching lines @@
       entry_(entry),
       self_ticks_(0),
       children_(CodeEntriesMatch),
       id_(tree->next_node_id()),
       line_ticks_(LineTickMatch) {}
 
 
 inline unsigned ProfileNode::function_id() const {
   return tree_->GetFunctionId(this);
 }
-} }  // namespace v8::internal
+}  // namespace internal
+}  // namespace v8
 
 #endif  // V8_PROFILER_PROFILE_GENERATOR_INL_H_