Mojo: Correctly handle large unsigned integer literals.

mojo/public/interfaces/bindings/tests/sample_service.mojom

Index: mojo/public/interfaces/bindings/tests/sample_service.mojom
diff --git a/mojo/public/interfaces/bindings/tests/sample_service.mojom b/mojo/public/interfaces/bindings/tests/sample_service.mojom
index 4ebc558e868c44d4b585cbc0909317b508fc438c..907f18f973b2bdb9213c8ca7cd4255cec777b225 100644
--- a/mojo/public/interfaces/bindings/tests/sample_service.mojom
+++ b/mojo/public/interfaces/bindings/tests/sample_service.mojom
@@ -9,6 +9,7 @@ import "sample_import2.mojom"
 module sample {
 
 const uint8 kTwelve = 12;
+const uint64 kTooBigForSignedInt64 = 9999999999999999999;
 
 struct Bar {
   enum Type {
@@ -49,11 +50,9 @@ struct DefaultsTest {
   int16 a2@2 = 1234;
   uint16 a3@3 = 34567;
   int32 a4@4 = 123456;
-  // TODO(vtl): crbug.com/375522
-  uint32 a5@5 /* = 3456789012 */;
+  uint32 a5@5 = 3456789012;
   int64 a6@6 = 111111111111;
-  // TODO(vtl): crbug.com/375522
-  uint64 a7@7 /* = 9999999999999999999 */;
+  uint64 a7@7 = 9999999999999999999;
   int32 a8@8 = 0x12345;
   int32 a9@9 = -0x12345;
   int32 a10@10 = +1234;