VR: Implement Omnibox input targeting.

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

Index: chrome/browser/android/vr_shell/ui_elements/url_bar.h
diff --git a/chrome/browser/android/vr_shell/ui_elements/url_bar.h b/chrome/browser/android/vr_shell/ui_elements/url_bar.h
index 75967e3c7c8681d029c998cdd2b71ca1dc869cc6..350797f0380e0ace5c70292e411c51fdc84acb97 100644
--- a/chrome/browser/android/vr_shell/ui_elements/url_bar.h
+++ b/chrome/browser/android/vr_shell/ui_elements/url_bar.h
@@ -22,10 +22,13 @@ class UrlBar : public TexturedElement {
   explicit UrlBar(int preferred_width);
   ~UrlBar() override;
 
-  void OnHoverEnter(const gfx::PointF& position) override;
   void OnHoverLeave() override;
-  void OnBeginFrame(const base::TimeTicks& begin_frame_time) override;
+  void OnHoverEnter(const gfx::PointF& position) override;
+  void OnMove(const gfx::PointF& position) override;
+  void OnButtonDown(const gfx::PointF& position) override;
   void OnButtonUp(const gfx::PointF& position) override;
+  bool HitTest(const gfx::PointF& point) const override;
+  void OnBeginFrame(const base::TimeTicks& begin_frame_time) override;
   void SetEnabled(bool enabled) override;
 
   void SetURL(const GURL& gurl);
@@ -35,9 +38,12 @@ class UrlBar : public TexturedElement {
  private:
   void UpdateTexture() override;
   UiTexture* GetTexture() const override;
+  void OnStateUpdated(const gfx::PointF& position);
+
   std::unique_ptr<UrlBarTexture> texture_;
   base::Callback<void()> back_button_callback_;
   bool enabled_ = false;
+  bool down_ = false;
   base::TimeTicks last_begin_frame_time_;
   base::TimeTicks last_update_time_;