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 0cbd58ea1ff9f09cf633e1ba43b291e39b157fc2..eaf4f2767d1ed1fb1968038a65a5a7b31b745af0 100644
--- a/chrome/browser/android/vr_shell/vr_shell_delegate.cc
+++ b/chrome/browser/android/vr_shell/vr_shell_delegate.cc
@@ -116,6 +116,11 @@ 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_);