Swap to foreground tab when following links that open in a new tab/window in VR Shell.

chrome/browser/android/vr_shell/vr_input_manager.cc

Index: chrome/browser/android/vr_shell/vr_input_manager.cc
diff --git a/chrome/browser/android/vr_shell/vr_input_manager.cc b/chrome/browser/android/vr_shell/vr_input_manager.cc
index e8ceb40ca4f51631706b59e5cb61ae8a5b82ae9d..efb98cbe86d6238af08d642026b3c08c90efb994 100644
--- a/chrome/browser/android/vr_shell/vr_input_manager.cc
+++ b/chrome/browser/android/vr_shell/vr_input_manager.cc
@@ -30,16 +30,11 @@ WebGestureEvent MakeGestureEvent(WebInputEvent::Type type,
 }  // namespace
 
 VrInputManager::VrInputManager(content::WebContents* web_contents)
-    : web_contents_(web_contents),
-      weak_ptr_factory_(this) {
+    : web_contents_(web_contents) {
 }
 
 VrInputManager::~VrInputManager() = default;
 
-base::WeakPtr<VrInputManager> VrInputManager::GetWeakPtr() {
-  return weak_ptr_factory_.GetWeakPtr();
-}
-
 void VrInputManager::ProcessUpdatedGesture(
     std::unique_ptr<blink::WebInputEvent> event) {
   if (WebInputEvent::isMouseEventType(event->type())) {