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

ui/android/view_android.cc

+// 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.
+
+#include "ui/android/view_android.h"
+
+#include "base/android/jni_android.h"
+#include "base/android/jni_helper.h"
+#include "base/android/scoped_java_ref.h"
+#include "jni/ViewAndroid_jni.h"
+#include "ui/gfx/android/window_android.h"
+
+namespace ui {
+
+using base::android::AttachCurrentThread;
+using base::android::ScopedJavaLocalRef;
+
+ViewAndroid::ViewAndroid(JNIEnv* env, jobject obj, WindowAndroid* window)
+  : weak_java_view_(env, obj),
+    window_android_(window) {}
+
+void ViewAndroid::Destroy(JNIEnv* env, jobject obj) {
+  DCHECK(obj && env->IsSameObject(weak_java_view_.get(env).obj(), obj));
+  delete this;
+}
+
+ScopedJavaLocalRef<jobject> ViewAndroid::GetJavaObject() {
+  return weak_java_view_.get(AttachCurrentThread());

[joth, 2013/04/18 01:41:17]

We should DCHECK that the local-ref is not null, with a comment that it is
mandatory to explicitly call destroy() before releasing the java side object.
(And maybe mention that if we would need to relax this is in future if adding 
CleanupReference based destruct path)

[aurimas (slooooooooow), 2013/04/18 02:49:57]

Done.

+}
+
+WindowAndroid* ViewAndroid::GetWindowAndroid() {
+  return window_android_;
+}
+
+bool ViewAndroid::RegisterViewAndroid(JNIEnv* env) {
+  return RegisterNativesImpl(env);
+}
+
+ViewAndroid::~ViewAndroid() {
+}
+
+jint Init(JNIEnv* env, jobject obj, jint window) {
+  ViewAndroid* view = new ViewAndroid(
+      env, obj, reinterpret_cast<ui::WindowAndroid*>(window));
+  return reinterpret_cast<jint>(view);
+}
+
+}  // namespace ui