Enable SurfaceView fullscreen video on Android with WebMediaPlayerImpl

content/browser/media/android/browser_surface_view_manager.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/browser_surface_view_manager.h"
+
+#include "content/browser/android/child_process_launcher_android.h"
+#include "content/browser/android/content_view_core_impl.h"
+#include "content/browser/gpu/gpu_surface_tracker.h"
+#include "content/browser/web_contents/web_contents_impl.h"
+#include "content/common/media/surface_view_manager_messages_android.h"
+#include "content/public/browser/render_frame_host.h"
+
+namespace content {
+
+BrowserSurfaceViewManager::BrowserSurfaceViewManager(
+    RenderFrameHost* render_frame_host)
+    : render_frame_host_(render_frame_host) {}
+
+void BrowserSurfaceViewManager::SetVideoSurface(
+    gfx::ScopedJavaSurface surface) {
+  if (surface.IsEmpty()) {
+    GpuSurfaceTracker::Get()->RemoveSurface(surface_view_id_);
+    UnregisterViewSurface(surface_view_id_);
+  } else {
+    // We mainly use the surface tracker to allocate a surface id for us. The
+    // lookup will go through the Android specific path and get the java
+    // surface directly, so there's no need to add a valid native widget here.
+    surface_view_id_ = GpuSurfaceTracker::Get()->AddSurfaceForNativeWidget(
+        gfx::kNullAcceleratedWidget);
+    RegisterViewSurface(surface_view_id_, surface.j_surface().obj());
+    Send(new RendererSurfaceViewManagerMsg_FullscreenSurfaceCreated(
+        render_frame_host_->GetRoutingID(), surface_view_id_));
+  }
+}
+
+void BrowserSurfaceViewManager::DidExitFullscreen(bool release_media_player) {
+  content_video_view_.reset();
+}
+
+void BrowserSurfaceViewManager::OnCreateFullscreenSurface() {
+  DCHECK(!ContentVideoView::GetInstance());
+  ContentViewCore* cvc = ContentViewCore::FromWebContents(
+      WebContents::FromRenderFrameHost(render_frame_host_));
+  content_video_view_.reset(new ContentVideoView(this, cvc));
+  base::android::ScopedJavaLocalRef<jobject> j_content_video_view =
+      content_video_view_->GetJavaObject(base::android::AttachCurrentThread());
+  if (!j_content_video_view.is_null()) {
+    // XXX: plumb through the size change event.

[DaleCurtis, 2016/02/02 01:01:32]

Do you have a vision for what this looks like? Another extension of the delegate
interface?

[watk, 2016/02/02 20:38:14]

Yeah, that's what I was thinking, but haven't figured out what the source of
truth for the size is.

[watk, 2016/02/05 03:42:30]

This turned out to be pretty simple. I just pass the size along with the surface
request. And then size changes are sent via a SizeChanged call.

+    content_video_view_->OnVideoSizeChanged(1280, 720);
+  }
+}
+
+bool BrowserSurfaceViewManager::Send(IPC::Message* msg) {
+  return render_frame_host_->Send(msg);
+}
+
+}  // namespace content