Mojo: Correctly handle large unsigned integer literals.

mojo/public/tools/bindings/generators/mojom_java_generator.py

Index: mojo/public/tools/bindings/generators/mojom_java_generator.py
diff --git a/mojo/public/tools/bindings/generators/mojom_java_generator.py b/mojo/public/tools/bindings/generators/mojom_java_generator.py
index 7364afc56ad725ff594c1180e68fc377d69071ce..ec897f750f2b97d4824cb6d1540355ae48b6f221 100644
--- a/mojo/public/tools/bindings/generators/mojom_java_generator.py
+++ b/mojo/public/tools/bindings/generators/mojom_java_generator.py
@@ -235,7 +235,12 @@ def ExpressionToText(context, token):
     return _TranslateNamedValue(token)
   # Add Long suffix to all number literals.
   if re.match('^[0-9]+$', token):
-    return token + 'L'
+    number = int(token)
+    # If the literal is too large to fit a signed long, convert it to the
+    # equivalent signed long.
+    if number >= 2 ** 63:
+      number -= 2 ** 64
+    return '%dL' % number
   return token
 
 def IsPointerArrayKind(kind):