DialogSurfaceManager implementation.

content/browser/media/android/dialog_surface_activity_mapper.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 "content/browser/media/android/dialog_surface_activity_mapper.h"
+
+#include "base/android/unguessable_token_android.h"
+#include "base/lazy_instance.h"
+#include "base/threading/thread_task_runner_handle.h"
+#include "base/unguessable_token.h"
+// TODO(liberato): browser_media_player_manager only does this if !USE_AURA
+#include "content/browser/android/content_view_core_impl.h"
+#include "content/browser/frame_host/render_frame_host_impl.h"
+#include "content/public/browser/render_process_host.h"
+#include "content/public/browser/web_contents.h"
+#include "jni/DialogSurfaceActivityMapper_jni.h"
+
+static base::android::ScopedJavaGlobalRef<jobject> GetContentViewCore(

[boliu, 2016/11/14 16:39:24]

anonymous namespace over static

[liberato (no reviews please), 2016/12/20 17:16:38]

Done.

+    const base::UnguessableToken& frame_token) {
+  DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
+
+  base::android::ScopedJavaGlobalRef<jobject> nullref;

[boliu, 2016/11/14 16:39:24]

nit: return nullptr works I think

[liberato (no reviews please), 2016/12/20 17:16:38]

didn't know that.  thanks!

+
+  // TODO(liberato): use |frame_token| to look up the RenderFrameHostImpl, and
+  // use that to get the ContentViewCore.
+  // When CVC is removed, we'll get this from the WindowAndroid.
+
+  // Get the frame from the id.
+  content::RenderFrameHostImpl* frame = nullptr;
+  // A separate CL adds content::RenderFrameHostImpl::FromFrameToken.
+  if (!frame) {
+    DVLOG(1) << "Cannot find frame for token " << frame_token;
+    return nullref;
+  }
+
+  content::WebContents* web_contents =
+      content::WebContents::FromRenderFrameHost(frame);
+  if (!web_contents) {
+    DVLOG(1) << "Cannot find web_contents for token " << frame_token;
+    return nullref;
+  }
+
+  content::ContentViewCore* cvc =
+      content::ContentViewCoreImpl::FromWebContents(web_contents);
+  if (!cvc) {
+    DVLOG(1) << "Cannot find cvc for token " << frame_token;
+    return nullref;
+  }
+
+  return base::android::ScopedJavaGlobalRef<jobject>(cvc->GetJavaObject());
+}
+
+static void PostContentViewCore(
+    const base::android::ScopedJavaGlobalRef<jobject>& frame_token_java,
+    const base::android::ScopedJavaGlobalRef<jobject>& mapper,
+    const base::android::ScopedJavaGlobalRef<jobject>& holder) {
+  JNIEnv* env = base::android::AttachCurrentThread();
+  base::UnguessableToken frame_token =
+      base::android::UnguessableTokenAndroid::FromJavaUnguessableToken(
+          env, frame_token_java);
+  base::android::ScopedJavaGlobalRef<jobject> cvc =
+      GetContentViewCore(frame_token);
+  content::Java_DialogSurfaceActivityMapper_onContentViewCore(
+      env, mapper.obj(), holder.obj(), cvc.obj());
+}
+
+namespace content {
+
+static void CallBackWithContentViewCore(
+    JNIEnv* env,
+    const base::android::JavaParamRef<jclass>& jcaller,
+    const base::android::JavaParamRef<jobject>& frame_token,
+    const base::android::JavaParamRef<jobject>& mapper,
+    const base::android::JavaParamRef<jobject>& holder) {
+  content::BrowserThread::PostTask(
+      content::BrowserThread::UI, FROM_HERE,
+      base::Bind(PostContentViewCore,
+                 base::android::ScopedJavaGlobalRef<jobject>(frame_token),
+                 base::android::ScopedJavaGlobalRef<jobject>(mapper),
+                 base::android::ScopedJavaGlobalRef<jobject>(holder)));
+}
+
+bool RegisterDialogSurfaceActivityMapper(JNIEnv* env) {
+  return RegisterNativesImpl(env);
+}
+
+}  // namespace content