Implement WebVR presentation pausing for VR Shell Menu Mode

chrome/browser/android/vr_shell/vr_shell_delegate.cc

Index: chrome/browser/android/vr_shell/vr_shell_delegate.cc
diff --git a/chrome/browser/android/vr_shell/vr_shell_delegate.cc b/chrome/browser/android/vr_shell/vr_shell_delegate.cc
index d4ce924bb39e442872567825273be37bf2807438..c7289b2b9137d1d21beab58ac2e2a7aa2d693700 100644
--- a/chrome/browser/android/vr_shell/vr_shell_delegate.cc
+++ b/chrome/browser/android/vr_shell/vr_shell_delegate.cc
@@ -6,6 +6,7 @@
 
 #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;
@@ -49,12 +50,16 @@ 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;
@@ -63,10 +68,10 @@ void VrShellDelegate::ExitWebVRIfNecessary(JNIEnv* env, jobject obj) {
 }
 
 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();