Update the generator to work around a MSVC limitation.

mojo/public/js/struct_unittests.js

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 define([
     "gin/test/expect",
     "mojo/public/interfaces/bindings/tests/rect.mojom",
     "mojo/public/interfaces/bindings/tests/test_structs.mojom",
     "mojo/public/js/codec",
     "mojo/public/js/validator",
@@ skipping 171 matching lines @@
     expect(decodedStruct.f3).toEqual(testStructs.FloatNumberValues.V3);
     expect(decodedStruct.f4).toEqual(testStructs.FloatNumberValues.V4);
     expect(decodedStruct.f5).toEqual(testStructs.FloatNumberValues.V5);
     expect(decodedStruct.f6).toEqual(testStructs.FloatNumberValues.V6);
     expect(decodedStruct.f7).toEqual(testStructs.FloatNumberValues.V7);
     expect(decodedStruct.f8).toEqual(testStructs.FloatNumberValues.V8);
     expect(decodedStruct.f9).toEqual(testStructs.FloatNumberValues.V9);
   }
 
   function testIntegerNumberValues() {
-    var minInt32 = -2147483648; // See crbug.com/445618
-    var decodedStruct = structEncodeDecode(
-      new testStructs.IntegerNumberValues({f10: minInt32}));
+    var decodedStruct = structEncodeDecode(new testStructs.IntegerNumberValues);
     expect(decodedStruct.f0).toEqual(testStructs.IntegerNumberValues.V0);
     expect(decodedStruct.f1).toEqual(testStructs.IntegerNumberValues.V1);
     expect(decodedStruct.f2).toEqual(testStructs.IntegerNumberValues.V2);
     expect(decodedStruct.f3).toEqual(testStructs.IntegerNumberValues.V3);
     expect(decodedStruct.f4).toEqual(testStructs.IntegerNumberValues.V4);
     expect(decodedStruct.f5).toEqual(testStructs.IntegerNumberValues.V5);
     expect(decodedStruct.f6).toEqual(testStructs.IntegerNumberValues.V6);
     expect(decodedStruct.f7).toEqual(testStructs.IntegerNumberValues.V7);
     expect(decodedStruct.f8).toEqual(testStructs.IntegerNumberValues.V8);
     expect(decodedStruct.f9).toEqual(testStructs.IntegerNumberValues.V9);
-    expect(decodedStruct.f10).toEqual(minInt32);
+    expect(decodedStruct.f10).toEqual(testStructs.IntegerNumberValues.V10);
     expect(decodedStruct.f11).toEqual(testStructs.IntegerNumberValues.V11);
     expect(decodedStruct.f12).toEqual(testStructs.IntegerNumberValues.V12);
     expect(decodedStruct.f13).toEqual(testStructs.IntegerNumberValues.V13);
     expect(decodedStruct.f14).toEqual(testStructs.IntegerNumberValues.V14);
     expect(decodedStruct.f15).toEqual(testStructs.IntegerNumberValues.V15);
     expect(decodedStruct.f16).toEqual(testStructs.IntegerNumberValues.V16);
     expect(decodedStruct.f17).toEqual(testStructs.IntegerNumberValues.V17);
     expect(decodedStruct.f18).toEqual(testStructs.IntegerNumberValues.V18);
     expect(decodedStruct.f19).toEqual(testStructs.IntegerNumberValues.V19);
   }
@@ skipping 48 matching lines @@
   testDefaultFieldValues();
   testScopedConstants();
   testMapKeyTypes();
   testMapValueTypes();
   testFloatNumberValues();
   testIntegerNumberValues();
   testUnsignedNumberValues();
   testBitArrayValues();
   this.result = "PASS";
 });