[Android] Refactor NativeView to be able to use it for AutofillDialog.

ui/android/view_android.h

+// Copyright (c) 2012 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 UI_VIEW_ANDROID_H_
+#define UI_VIEW_ANDROID_H_
+
+#include <jni.h>
+#include "base/android/jni_helper.h"
+#include "base/android/scoped_java_ref.h"
+
+namespace ui {
+
+class WindowAndroid;
+
+// This class deals with the Android native window ref count.
+class ViewAndroid {
+ public:
+  ViewAndroid(JNIEnv* env, jobject obj, WindowAndroid* window);
+
+  void Destroy(JNIEnv* env, jobject obj);

[aruslan, 2013/04/12 16:53:35]

This should be called strictly from the Java side by the owner of the object.
(*env)->IsSameObject(env, obj1, obj2).

[aurimas (slooooooooow), 2013/04/12 18:00:05]

Done.

+
+  WindowAndroid* GetWindowAndroid();
+
+  base::android::ScopedJavaLocalRef<jobject> GetJavaObject();
+
+  static bool RegisterViewAndroid(JNIEnv* env);
+
+ private:
+  ~ViewAndroid();
+  JavaObjectWeakGlobalRef weak_java_view_;
+  WindowAndroid* window_android_;
+
+  DISALLOW_COPY_AND_ASSIGN(ViewAndroid);
+};
+
+}  // namespace ui
+
+#endif  // UI_VIEW_ANDROID_H_