Implement WebVR presentation pausing for VR Shell Menu Mode

device/vr/android/gvr/gvr_device_provider.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 "device/vr/android/gvr/gvr_device_provider.h"
 
 #include <jni.h>
 
 #include "base/android/context_utils.h"
 #include "base/android/jni_android.h"
@@ skipping 38 matching lines @@
   if (!delegate_provider)
     return;
 
   if (!vr_device_) {
     vr_device_.reset(
         new GvrDevice(this, delegate_provider->GetNonPresentingDelegate()));
   }
 }
 
 bool GvrDeviceProvider::RequestPresent() {
+  DCHECK(main_thread_task_runner_->BelongsToCurrentThread());
   device::GvrDelegateProvider* delegate_provider =
       device::GvrDelegateProvider::GetInstance();
   if (!delegate_provider)
     return false;
 
   // RequestWebVRPresent is async as a render thread may be created.
   return delegate_provider->RequestWebVRPresent(this);
 }
 
 void GvrDeviceProvider::ExitPresent() {
@@ skipping 10 matching lines @@
   vr_device_->SetDelegate(delegate_provider->GetNonPresentingDelegate());
 
   GamepadDataFetcherManager::GetInstance()->RemoveSourceFactory(
       GAMEPAD_SOURCE_GVR);
 
   delegate_provider->ExitWebVRPresent();
 }
 
 void GvrDeviceProvider::OnGvrDelegateReady(GvrDelegate* delegate) {
   main_thread_task_runner_->PostTask(
-      FROM_HERE,
-      base::Bind(&GvrDeviceProvider::GvrDelegateReady, base::Unretained(this),
-                 base::Unretained(delegate)));
+      FROM_HERE, base::Bind(&GvrDeviceProvider::GvrDelegateReady, this,
+                            base::Unretained(delegate)));
 }
 
 void GvrDeviceProvider::OnGvrDelegateRemoved() {
   DCHECK(main_thread_task_runner_->BelongsToCurrentThread());
   if (!vr_device_)
     return;
   ExitPresent();
 }
 
+void GvrDeviceProvider::OnDisplayBlur() {
+  if (!main_thread_task_runner_->BelongsToCurrentThread()) {
+    main_thread_task_runner_->PostTask(
+        FROM_HERE, base::Bind(&GvrDeviceProvider::OnDisplayBlur, this));
+    return;
+  }
+  if (!vr_device_)
+    return;
+  vr_device_->OnDisplayBlur();
+}
+
+void GvrDeviceProvider::OnDisplayFocus() {
+  if (!main_thread_task_runner_->BelongsToCurrentThread()) {
+    main_thread_task_runner_->PostTask(
+        FROM_HERE, base::Bind(&GvrDeviceProvider::OnDisplayFocus, this));
+    return;
+  }
+  if (!vr_device_)
+    return;
+  vr_device_->OnDisplayFocus();
+}
+
 void GvrDeviceProvider::GvrDelegateReady(GvrDelegate* delegate) {
   DCHECK(main_thread_task_runner_->BelongsToCurrentThread());
 
   vr_device_->SetDelegate(delegate);
   GamepadDataFetcherManager::GetInstance()->AddFactory(
       new GvrGamepadDataFetcher::Factory(delegate, vr_device_->id()));
 }
 
 }  // namespace device