Update the generator to work around a MSVC limitation.

mojo/public/js/struct_unittests.js

Index: mojo/public/js/struct_unittests.js
diff --git a/mojo/public/js/struct_unittests.js b/mojo/public/js/struct_unittests.js
index d91ff4d1623bad23de411cc6e74723a04e6c9990..39a8978139d1c4baa95643fd63567e90e1b07ede 100644
--- a/mojo/public/js/struct_unittests.js
+++ b/mojo/public/js/struct_unittests.js
@@ -189,9 +189,7 @@ define([
   }
 
   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);
@@ -202,7 +200,7 @@ define([
     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);