Add IntDefs to generated Java enums.

build/android/gyp/java_cpp_enum_tests.py

Index: build/android/gyp/java_cpp_enum_tests.py
diff --git a/build/android/gyp/java_cpp_enum_tests.py b/build/android/gyp/java_cpp_enum_tests.py
index 902bbfad532886f41c7575ac172b3229b0c8d80a..3444cfa254affb6369f18017e5b56d379cecc020 100755
--- a/build/android/gyp/java_cpp_enum_tests.py
+++ b/build/android/gyp/java_cpp_enum_tests.py
@@ -40,7 +40,17 @@ class TestPreprocess(unittest.TestCase):
 
 package some.package;
 
+import android.support.annotation.IntDef;
+
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+
 public class ClassName {
+  @IntDef({
+      E1, E2
+  })
+  @Retention(RetentionPolicy.SOURCE)
+  public @interface ClassNameEnum {}
   public static final int E1 = 1;
   public static final int E2 = 2 << 2;
 }