jni_generator: Make all object-returning natives return ScopedJavaLocalRef.

chrome/browser/profiles/profile_android.h

Index: chrome/browser/profiles/profile_android.h
diff --git a/chrome/browser/profiles/profile_android.h b/chrome/browser/profiles/profile_android.h
index b336342ca03a49dcb8c479b6cf5d1f7a796c742d..e6ed2c87da21a13b8bd22b965f36d877465ac7fb 100644
--- a/chrome/browser/profiles/profile_android.h
+++ b/chrome/browser/profiles/profile_android.h
@@ -21,7 +21,9 @@ class ProfileAndroid : public base::SupportsUserData::Data {
   static Profile* FromProfileAndroid(jobject obj);
   static bool RegisterProfileAndroid(JNIEnv* env);
 
-  static jobject GetLastUsedProfile(JNIEnv* env, jclass clazz);
+  static base::android::ScopedJavaLocalRef<jobject> GetLastUsedProfile(
+      JNIEnv* env,
+      jclass clazz);
 
   // Destroys this Profile when possible.
   void DestroyWhenAppropriate(JNIEnv* env, jobject obj);