VR Shell: Allow UI elements to determine hit testing.

chrome/browser/android/vr_shell/ui_elements/url_bar.cc

Index: chrome/browser/android/vr_shell/ui_elements/url_bar.cc
diff --git a/chrome/browser/android/vr_shell/ui_elements/url_bar.cc b/chrome/browser/android/vr_shell/ui_elements/url_bar.cc
index 94c068dc587c0f39f23e611172be888c55776174..8bca9056fdc2ff98c1f8fb588d7e1d5cf61b2873 100644
--- a/chrome/browser/android/vr_shell/ui_elements/url_bar.cc
+++ b/chrome/browser/android/vr_shell/ui_elements/url_bar.cc
@@ -34,7 +34,7 @@ UiTexture* UrlBar::GetTexture() const {
   return texture_.get();
 }
 
-void UrlBar::OnHoverEnter(gfx::PointF position) {
+void UrlBar::OnHoverEnter(const gfx::PointF& position) {
   if (!texture_->SetDrawFlags(UrlBarTexture::FLAG_HOVER))
     return;
   UpdateTexture();
@@ -46,7 +46,7 @@ void UrlBar::OnHoverLeave() {
   UpdateTexture();
 }
 
-void UrlBar::OnButtonUp(gfx::PointF position) {
+void UrlBar::OnButtonUp(const gfx::PointF& position) {
   back_button_callback_.Run();
 }