[presubmit] Enable readability/namespace linter checking.

src/debug/liveedit.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_DEBUG_LIVEEDIT_H_
 #define V8_DEBUG_LIVEEDIT_H_
 
 
 // Live Edit feature implementation.
 // User should be able to change script on already running VM. This feature
@@ skipping 346 matching lines @@
  private:
   static const int kFunctionNameOffset_ = 0;
   static const int kStartPositionOffset_ = 1;
   static const int kEndPositionOffset_ = 2;
   static const int kSharedInfoOffset_ = 3;
   static const int kSize_ = 4;
 
   friend class JSArrayBasedStruct<SharedInfoWrapper>;
 };
 
-} }  // namespace v8::internal
+}  // namespace internal
+}  // namespace v8
 
 #endif /* V8_DEBUG_LIVEEDIT_H_ */