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

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

+// Copyright (c) 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.
+
+package org.chromium.ui;
+
+import org.chromium.base.JNINamespace;
+import org.chromium.ui.ViewAndroidDelegate;
+import org.chromium.ui.WindowAndroid;
+
+/**
+ * From the Chromium architecture point of view, ViewAndroid and its native counterpart
+ * serve purpose of representing Android view where Chrome expects to have a cross platform
+ * handle to the system view type. As Views are Java object on Android, this ViewAndroid
+ * and its native counterpart provide the expected abstractions on the C++ side and allow
+ * it to be flexibly glued to an actual Android Java View at runtime.
+ *
+ * It should only be used where access to Android Views is needed from the C++ code.
+ */
+@JNINamespace("ui")
+public class ViewAndroid {
+    // Native pointer to the c++ ViewAndroid object.
+    private int mNativeViewAndroid = 0;
+    private final WindowAndroid mNativeWindow;

[nilesh, 2013/04/19 20:52:30]

mWindowAndroid

[aurimas (slooooooooow), 2013/04/19 21:32:04]

Done.

+    private final ViewAndroidDelegate mViewAndroidDelegate;
+
+    /**
+     * Constructs a View object.
+     */
+    public ViewAndroid(WindowAndroid nativeWindow, ViewAndroidDelegate viewAndroidDelegate) {
+        mNativeWindow = nativeWindow;
+        mViewAndroidDelegate = viewAndroidDelegate;
+        mNativeViewAndroid = nativeInit(mNativeWindow.getNativePointer());
+    }
+
+    public ViewAndroidDelegate getViewAndroidDelegate() {
+        return mViewAndroidDelegate;
+    }
+
+    /**
+     * 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.
+     * @return A pointer to the c++ AndroidWindow.
+     */
+    public int getNativePointer() {
+        return mNativeViewAndroid;
+    }
+
+    private native int nativeInit(int windowPtr);
+    private native void nativeDestroy(int nativeViewAndroid);
+}