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

ui/android/java/src/org/chromium/ui/NativeView.java

+// 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.
+
+package org.chromium.ui;
+
+import org.chromium.base.JNINamespace;
+import org.chromium.ui.ContainerViewDelegate;
+import org.chromium.ui.gfx.NativeWindow;
+
+/**
+ * TODO: Insert description here. (generated by aurimas)
+ */
+@JNINamespace("ui")
+public class NativeView {
+    // Native pointer to the c++ ViewAndroid object.
+    private int mNativeViewAndroid = 0;
+    private final NativeWindow mNativeWindow;
+    public final ContainerViewDelegate mContainerViewDelegate;
+
+    /**
+     * Constructs a View object.
+     */
+    public NativeView(NativeWindow nativeWindow, ContainerViewDelegate containerViewDelegate) {
+        mNativeViewAndroid = 0;
+        mNativeWindow = nativeWindow;
+        mContainerViewDelegate = containerViewDelegate;
+    }
+
+    /**
+     * Destroys the c++ ViewAndroid object if one has been created.
+     */
+    public void destroy() {
+        if (mNativeViewAndroid != 0) {
+            nativeDestroy(mNativeViewAndroid);
+            mNativeViewAndroid = 0;
+        }
+    }
+
+    /**
+     * Returns a pointer to the c++ AndroidWindow object and calls the initializer if
+     * the object has not been previously initialized.
+     * @return A pointer to the c++ AndroidWindow.
+     */
+    public int getNativePointer() {
+        if (mNativeViewAndroid == 0) {
+            mNativeViewAndroid = nativeInit(mNativeWindow.getNativePointer());
+        }
+        return mNativeViewAndroid;
+    }
+
+    private native int nativeInit(int windowPtr);
+    private native void nativeDestroy(int nativeViewAndroid);
+}