[Chromecast] Turn CastContentWindow into an abstract interface.

chromecast/browser/android/cast_web_contents_activity.cc

+// Copyright 2016 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 "chromecast/browser/android/cast_web_contents_activity.h"
+
+#include "content/public/browser/web_contents.h"
+#include "jni/CastWebContentsActivity_jni.h"
+
+namespace chromecast {
+namespace shell {
+
+namespace {
+const void* kCastWebContentsActivityData;
+const void* kCastWebContentsActivityKey =
+    static_cast<const void*>(&kCastWebContentsActivityData);
+}  // namespace
+
+// static
+void SetContentVideoViewEmbedder(
+    JNIEnv* env,
+    const base::android::JavaParamRef<jobject>& jcaller,
+    const base::android::JavaParamRef<jobject>& webContents,
+    const base::android::JavaParamRef<jobject>& embedder) {
+  content::WebContents* web_contents =
+      content::WebContents::FromJavaWebContents(webContents);
+  DCHECK(web_contents);
+  CastWebContentsActivity* activity =
+      CastWebContentsActivity::Get(web_contents);
+  activity->SetContentVideoViewEmbedder(embedder);
+}
+
+// static
+bool CastWebContentsActivity::RegisterJni(JNIEnv* env) {
+  return RegisterNativesImpl(env);
+}
+
+// static
+CastWebContentsActivity* CastWebContentsActivity::Get(
+    content::WebContents* web_contents) {
+  DCHECK(web_contents);
+  CastWebContentsActivity* instance = static_cast<CastWebContentsActivity*>(
+      web_contents->GetUserData(kCastWebContentsActivityKey));
+  if (!instance) {
+    instance = new CastWebContentsActivity(web_contents);
+    web_contents->SetUserData(kCastWebContentsActivityKey, instance);
+  }
+  return instance;
+}
+
+CastWebContentsActivity::CastWebContentsActivity(
+    content::WebContents* web_contents)
+    : content_video_view_embedder_(
+          base::android::ScopedJavaLocalRef<jobject>()) {}
+
+CastWebContentsActivity::~CastWebContentsActivity() {}
+
+base::android::ScopedJavaLocalRef<jobject>
+CastWebContentsActivity::GetContentVideoViewEmbedder() {
+  return base::android::ScopedJavaLocalRef<jobject>(
+      content_video_view_embedder_);
+}
+
+void CastWebContentsActivity::SetContentVideoViewEmbedder(
+    const base::android::JavaRef<jobject>& content_video_view_embedder) {
+  content_video_view_embedder_ =
+      base::android::ScopedJavaGlobalRef<jobject>(content_video_view_embedder);
+}
+
+}  // namespace shell
+}  // namespace chromecast