Use GVR async reprojection video surface for fullscreen in VR shell

chrome/browser/android/vr_shell/vr_shell.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 "chrome/browser/android/vr_shell/vr_shell.h"
 
 #include <android/native_window_jni.h>
 
 #include "base/metrics/histogram_macros.h"
 #include "base/threading/platform_thread.h"
 #include "base/threading/thread.h"
 #include "base/threading/thread_restrictions.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "base/values.h"
 #include "chrome/browser/android/vr_shell/ui_interface.h"
 #include "chrome/browser/android/vr_shell/vr_compositor.h"
 #include "chrome/browser/android/vr_shell/vr_input_manager.h"
 #include "chrome/browser/android/vr_shell/vr_shell_delegate.h"
 #include "chrome/browser/android/vr_shell/vr_shell_gl.h"
 #include "chrome/browser/android/vr_shell/vr_usage_monitor.h"
 #include "chrome/browser/android/vr_shell/vr_web_contents_observer.h"
+#include "content/public/browser/android/video_surface_manager.h"
 #include "content/public/browser/navigation_controller.h"
 #include "content/public/browser/render_view_host.h"
 #include "content/public/browser/render_widget_host.h"
 #include "content/public/browser/render_widget_host_view.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/common/referrer.h"
 #include "device/vr/android/gvr/gvr_device_provider.h"
 #include "jni/VrShellImpl_jni.h"
 #include "ui/android/view_android.h"
 #include "ui/android/window_android.h"
@@ skipping 111 matching lines @@
 
   if (for_web_vr)
     metrics_helper_->SetWebVREnabled(true);
   html_interface_.reset(new UiInterface(
       for_web_vr ? UiInterface::Mode::WEB_VR : UiInterface::Mode::STANDARD,
       main_contents_->IsFullscreen()));
   vr_web_contents_observer_.reset(new VrWebContentsObserver(
       main_contents, html_interface_.get(), this));
 
   SetShowingOverscrollGlow(false);
+  content::VideoSurfaceManager::GetInstance()->
+      SetOverrideVideoSurfaceProvider(this);
 }
 
 void VrShell::Destroy(JNIEnv* env, const JavaParamRef<jobject>& obj) {
+  content::VideoSurfaceManager::GetInstance()->
+      RemoveOverrideVideoSurfaceProvider(this);
   delete this;
 }
 
 void VrShell::LoadUIContent(JNIEnv* env, const JavaParamRef<jobject>& obj) {
   GURL url(kVrShellUIURL);
   ui_contents_->GetController().LoadURL(
       url, content::Referrer(),
       ui::PageTransition::PAGE_TRANSITION_AUTO_TOPLEVEL, std::string(""));
 }
 
@@ skipping 290 matching lines @@
   JNIEnv* env = base::android::AttachCurrentThread();
   Java_VrShellImpl_setContentCssSize(env, j_vr_shell_.obj(), width, height,
                                      dpr);
 }
 
 void VrShell::SetUiCssSize(float width, float height, float dpr) {
   JNIEnv* env = base::android::AttachCurrentThread();
   Java_VrShellImpl_setUiCssSize(env, j_vr_shell_.obj(), width, height, dpr);
 }
 
+void VrShell::OnVideoSizeChanged(int width, int height) {
+  // TODO(amp): Do something intelligent with the size.
+}
+
+void VrShell::CreateVideoSurface(content::VideoSurfaceProvider::Client* client,
+                                 const gfx::Size& video_natural_size) {
+  client_ = client;
+  JNIEnv* env = base::android::AttachCurrentThread();
+  Java_VrShellImpl_createVideoSurface(env, j_vr_shell_.obj());
+  // TODO(amp): Use the natural size somehow.
+}
+
+void VrShell::SetVideoSurface(JNIEnv*,
+                                   const JavaParamRef<jobject>&,
+                                   const JavaParamRef<jobject>& surface) {
+  client_->SetVideoSurface(
+      gl::ScopedJavaSurface::AcquireExternalSurface(surface));
+}
+
 // ----------------------------------------------------------------------------
 // Native JNI methods
 // ----------------------------------------------------------------------------
 
 jlong Init(JNIEnv* env, const JavaParamRef<jobject>& obj,
            const JavaParamRef<jobject>& content_web_contents,
            jlong content_window_android,
            const JavaParamRef<jobject>& ui_web_contents,
            jlong ui_window_android, jboolean for_web_vr,
            const base::android::JavaParamRef<jobject>& delegate,
            jlong gvr_api, jboolean reprojected_rendering) {
   return reinterpret_cast<intptr_t>(new VrShell(
       env, obj, content::WebContents::FromJavaWebContents(content_web_contents),
       reinterpret_cast<ui::WindowAndroid*>(content_window_android),
       content::WebContents::FromJavaWebContents(ui_web_contents),
       reinterpret_cast<ui::WindowAndroid*>(ui_window_android),
       for_web_vr, VrShellDelegate::GetNativeDelegate(env, delegate),
       reinterpret_cast<gvr_context*>(gvr_api), reprojected_rendering));
 }
 
 }  // namespace vr_shell