VR Shell: Allow UI elements to determine hit testing.

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

 // Copyright 2017 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/android/vr_shell/ui_elements/url_bar.h"
 
 #include "base/memory/ptr_util.h"
 #include "chrome/browser/android/vr_shell/textures/url_bar_texture.h"
 
 namespace vr_shell {
@@ skipping 16 matching lines @@
 
 void UrlBar::UpdateTexture() {
   TexturedElement::UpdateTexture();
   last_update_time_ = last_begin_frame_time_;
 }
 
 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();
 }
 
 void UrlBar::OnHoverLeave() {
   if (!texture_->SetDrawFlags(0))
     return;
   UpdateTexture();
 }
 
-void UrlBar::OnButtonUp(gfx::PointF position) {
+void UrlBar::OnButtonUp(const gfx::PointF& position) {
   back_button_callback_.Run();
 }
 
 void UrlBar::OnBeginFrame(const base::TimeTicks& begin_frame_time) {
   last_begin_frame_time_ = begin_frame_time;
   if (enabled_ && texture_->dirty()) {
     int64_t delta_ms = (begin_frame_time - last_update_time_).InMilliseconds();
     if (delta_ms > kUpdateDelayMS)
       UpdateTexture();
   }
@@ skipping 10 matching lines @@
 
 void UrlBar::SetSecurityLevel(int level) {
   texture_->SetSecurityLevel(level);
 }
 
 void UrlBar::SetBackButtonCallback(const base::Callback<void()>& callback) {
   back_button_callback_ = callback;
 }
 
 }  // namespace vr_shell