Revert of mojo VR interface simplified

device/vr/android/gvr/gvr_device_provider.cc

Index: device/vr/android/gvr/gvr_device_provider.cc
diff --git a/device/vr/android/gvr/gvr_device_provider.cc b/device/vr/android/gvr/gvr_device_provider.cc
index 8a3637d25902a91e6e08143cae45ada582d26a32..252aa117667e09cce9ca7041c791706dc8c2a220 100644
--- a/device/vr/android/gvr/gvr_device_provider.cc
+++ b/device/vr/android/gvr/gvr_device_provider.cc
@@ -43,6 +43,11 @@
     devices->push_back(vr_device_.get());
 }
 
+void GvrDeviceProvider::SetClient(VRClientDispatcher* client) {
+  if (!client_)
+    client_.reset(client);
+}
+
 void GvrDeviceProvider::Initialize() {
   device::GvrDelegateProvider* delegate_provider =
       device::GvrDelegateProvider::GetInstance();
@@ -52,6 +57,7 @@
   if (!vr_device_) {
     vr_device_.reset(
         new GvrDevice(this, delegate_provider->GetNonPresentingDelegate()));
+    client_->OnDeviceConnectionStatusChanged(vr_device_.get(), true);
   }
 }
 
@@ -82,6 +88,9 @@
       GAMEPAD_SOURCE_GVR);
 
   delegate_provider->ExitWebVRPresent();
+
+  if (client_)
+    client_->OnPresentEnded(vr_device_.get());
 }
 
 void GvrDeviceProvider::OnGvrDelegateReady(GvrDelegate* delegate) {