[presubmit] Enable readability/namespace linter checking.

test/cctest/test-asm-validator.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/ast.h"
 #include "src/ast-expression-visitor.h"
 #include "src/parser.h"
 #include "src/rewriter.h"
@@ skipping 56 matching lines @@
   FunctionLiteral* root =
       info.scope()->declarations()->at(0)->AsFunctionDeclaration()->fun();
   AsmTyper typer(isolate, zone, *script, root);
   if (typer.Validate()) {
     ExpressionTypeCollector(isolate, zone, root, types).Run();
     return "";
   } else {
     return typer.error_message();
   }
 }
-}
+
+}  // namespace
 
 
 TEST(ValidateMinimum) {
   const char test_function[] =
       "function GeometricMean(stdlib, foreign, buffer) {\n"
       "  \"use asm\";\n"
       "\n"
       "  var exp = stdlib.Math.exp;\n"
       "  var log = stdlib.Math.log;\n"
       "  var values = new stdlib.Float64Array(buffer);\n"
@@ skipping 344 matching lines @@
   // var values = new stdlib.*Array(buffer);
   CHECK_VAR_NEW_SHORTCUT(u8, Bounds(cache.kUint8Array));
   CHECK_VAR_NEW_SHORTCUT(i8, Bounds(cache.kInt8Array));
   CHECK_VAR_NEW_SHORTCUT(u16, Bounds(cache.kUint16Array));
   CHECK_VAR_NEW_SHORTCUT(i16, Bounds(cache.kInt16Array));
   CHECK_VAR_NEW_SHORTCUT(u32, Bounds(cache.kUint32Array));
   CHECK_VAR_NEW_SHORTCUT(i32, Bounds(cache.kInt32Array));
   CHECK_VAR_NEW_SHORTCUT(f32, Bounds(cache.kFloat32Array));
   CHECK_VAR_NEW_SHORTCUT(f64, Bounds(cache.kFloat64Array));
 }
-}
+
+}  // namespace
 
 
 #define CHECK_FUNC_TYPES_BEGIN(func)                   \
   HARNESS_PREAMBLE()                                   \
   func "\n" HARNESS_POSTAMBLE();                       \
                                                        \
   v8::V8::Initialize();                                \
   HandleAndZoneScope handles;                          \
   Zone* zone = handles.main_zone();                    \
   ZoneVector<ExpressionTypeEntry> types(zone);         \
@@ skipping 453 matching lines @@
   "return {foo: foo, bar: 1};"
   "}\n";
 
   v8::V8::Initialize();
   HandleAndZoneScope handles;
   Zone* zone = handles.main_zone();
   ZoneVector<ExpressionTypeEntry> types(zone);
   CHECK_EQ("asm: line 40: non-function in function table\n",
            Validate(zone, test_function, &types));
 }