Switch tabs from VR shell.

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 b85b14f483f694a4118f4287d0840fdf2f5dfca8..3a4e46942bbac967dbaf5b03ab8acdcdde500c27 100644
--- a/chrome/browser/android/vr_shell/vr_shell_delegate.cc
+++ b/chrome/browser/android/vr_shell/vr_shell_delegate.cc
@@ -118,6 +118,11 @@ void VrShellDelegate::OnResume(JNIEnv* env,
   }
 }
 
+void VrShellDelegate::ShowTab(int id) {
+  JNIEnv* env = AttachCurrentThread();
+  Java_VrShellDelegate_showTab(env, j_vr_shell_delegate_.obj(), id);
+}
+
 void VrShellDelegate::SetDeviceProvider(
     device::GvrDeviceProvider* device_provider) {
   CHECK(!device_provider_);