[presubmit] Enable readability/namespace linter checking.

test/cctest/compiler/test-loop-assignment-analysis.cc

 // Copyright 2014 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/compiler/ast-loop-assignment-analyzer.h"
 #include "src/parser.h"
 #include "src/rewriter.h"
 #include "src/scopes.h"
 #include "test/cctest/cctest.h"
 
@@ skipping 41 matching lines @@
     CHECK(var);
 
     if (var->location() == VariableLocation::UNALLOCATED) {
       CHECK_EQ(0, expected);
     } else {
       CHECK(var->IsStackAllocated());
       CHECK_EQ(expected, result->GetAssignmentCountForTesting(scope, var));
     }
   }
 };
-}
+}  // namespace
 
 
 TEST(SimpleLoop1) {
   TestHelper f("var x = 0; while (x) ;");
 
   f.CheckLoopAssignedCount(0, "x");
 }
 
 
 TEST(SimpleLoop2) {
@@ skipping 213 matching lines @@
       "    while (1) z++;"
       "  }"
       "}"
       "w;");
 
   f.CheckLoopAssignedCount(1, "x");
   f.CheckLoopAssignedCount(3, "y");
   f.CheckLoopAssignedCount(5, "z");
   f.CheckLoopAssignedCount(0, "w");
 }