jni: Pass method parameters as JavaParamRef in content.

content/browser/android/date_time_chooser_android.h

Index: content/browser/android/date_time_chooser_android.h
diff --git a/content/browser/android/date_time_chooser_android.h b/content/browser/android/date_time_chooser_android.h
index 6e6c8954b9c04fd23c76bfde18b307cbde12b984..ee527ab77482510a98cd3ed93b39fd054799340a 100644
--- a/content/browser/android/date_time_chooser_android.h
+++ b/content/browser/android/date_time_chooser_android.h
@@ -38,10 +38,12 @@ class DateTimeChooserAndroid {
                   const std::vector<DateTimeSuggestion>& suggestions);
 
   // Replaces the current value
-  void ReplaceDateTime(JNIEnv* env, jobject, jdouble value);
+  void ReplaceDateTime(JNIEnv* env,
+                       const base::android::JavaRef<jobject>&,
+                       jdouble value);
 
   // Closes the dialog without propagating any changes.
-  void CancelDialog(JNIEnv* env, jobject);
+  void CancelDialog(JNIEnv* env, const base::android::JavaRef<jobject>&);
 
  private:
   RenderViewHost* host_;