Implement WebVR presentation pausing for VR Shell Menu Mode

chrome/browser/android/vr_shell/vr_shell_delegate.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_delegate.h"
 
 #include "base/android/jni_android.h"
 #include "chrome/browser/android/vr_shell/vr_shell.h"
+#include "device/vr/android/gvr/gvr_device_provider.h"
 #include "jni/VrShellDelegate_jni.h"
 
 using base::android::JavaParamRef;
 using base::android::AttachCurrentThread;
 
 namespace vr_shell {
 
 // A non presenting delegate for magic window mode.
 class GvrNonPresentingDelegate : public device::GvrDelegate {
  public:
@@ skipping 23 matching lines @@
 VrShellDelegate::VrShellDelegate(JNIEnv* env, jobject obj)
     : device_provider_(nullptr) {
   j_vr_shell_delegate_.Reset(env, obj);
   GvrDelegateProvider::SetInstance(this);
 }
 
 VrShellDelegate::~VrShellDelegate() {
   GvrDelegateProvider::SetInstance(nullptr);
 }
 
-VrShellDelegate* VrShellDelegate::getNativeDelegate(
+VrShellDelegate* VrShellDelegate::GetNativeDelegate(
     JNIEnv* env, jobject jdelegate) {
   long native_delegate = Java_VrShellDelegate_getNativePointer(env, jdelegate);
   return reinterpret_cast<VrShellDelegate*>(native_delegate);
 }
 
+scoped_refptr<device::GvrDeviceProvider> VrShellDelegate::GetDeviceProvider() {
+  return device_provider_;
+}
+
 void VrShellDelegate::ExitWebVRIfNecessary(JNIEnv* env, jobject obj) {
   if (!device_provider_)
     return;
 
   device_provider_->OnGvrDelegateRemoved();
 }
 
 bool VrShellDelegate::RequestWebVRPresent(
-    device::GvrDeviceProvider* device_provider) {
+    scoped_refptr<device::GvrDeviceProvider> device_provider) {
   // Only set one device provider at a time
-  DCHECK(!device_provider_);
-  device_provider_ = device_provider;
+  DCHECK(!device_provider_.get());

[dcheng, 2016/11/11 00:48:21]

Nit: no .get()

[mthiesse, 2016/11/11 20:19:21]

Done.

+  device_provider_ = std::move(device_provider);
 
   // If/When VRShell is ready for use it will call OnVrShellReady.
   JNIEnv* env = AttachCurrentThread();
   return Java_VrShellDelegate_enterVRIfNecessary(env,
                                                  j_vr_shell_delegate_.obj(),
                                                  true);
 }
 
 void VrShellDelegate::ExitWebVRPresent() {
   if (!device_provider_)
@@ skipping 38 matching lines @@
 
 bool RegisterVrShellDelegate(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }
 
 jlong Init(JNIEnv* env, const JavaParamRef<jobject>& obj) {
   return reinterpret_cast<intptr_t>(new VrShellDelegate(env, obj));
 }
 
 }  // namespace vr_shell