Straighten up life cycle of native InfoBar pointers

chrome/browser/ui/android/infobars/infobar_android.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_UI_ANDROID_INFOBARS_INFOBAR_ANDROID_H_
 #define CHROME_BROWSER_UI_ANDROID_INFOBARS_INFOBAR_ANDROID_H_
 
 #include <string>
 
 #include "base/android/jni_weak_ref.h"
@@ skipping 56 matching lines @@
   // Acquire the java infobar from a different one.  This is used to do in-place
   // replacements.
   virtual void PassJavaInfoBar(InfoBarAndroid* source) {}
 
  protected:
   // Derived classes must implement this method to process the corresponding
   // action.
   virtual void ProcessButton(int action,
                              const std::string& action_value) = 0;
   void CloseInfoBar();
+  InfoBarAndroid* infobar_android() { return this; }
 
  private:
   base::android::ScopedJavaGlobalRef<jobject> java_info_bar_;
 
   DISALLOW_COPY_AND_ASSIGN(InfoBarAndroid);
 };
 
 // Registers the NativeInfoBar's native methods through JNI.
 bool RegisterNativeInfoBar(JNIEnv* env);
 
 #endif  // CHROME_BROWSER_UI_ANDROID_INFOBARS_INFOBAR_ANDROID_H_