Refactor VR Shell Input. Locks input to click/scroll targets.

chrome/browser/android/vr_shell/BUILD.gn

Index: chrome/browser/android/vr_shell/BUILD.gn
diff --git a/chrome/browser/android/vr_shell/BUILD.gn b/chrome/browser/android/vr_shell/BUILD.gn
index bc0176139a60b80cb89718aa823fc73d29a57672..2d491cbf9b65e413ef84e5a40e5c27290cf4cc93 100644
--- a/chrome/browser/android/vr_shell/BUILD.gn
+++ b/chrome/browser/android/vr_shell/BUILD.gn
@@ -32,6 +32,8 @@ if (current_cpu == "arm" || current_cpu == "arm64") {
       "mailbox_to_surface_bridge.h",
       "non_presenting_gvr_delegate.cc",
       "non_presenting_gvr_delegate.h",
+      "textures/close_button_texture.cc",
+      "textures/close_button_texture.h",
       "textures/insecure_content_permanent_texture.cc",
       "textures/insecure_content_permanent_texture.h",
       "textures/insecure_content_transient_texture.cc",
@@ -40,6 +42,8 @@ if (current_cpu == "arm" || current_cpu == "arm64") {
       "textures/ui_texture.h",
       "textures/url_bar_texture.cc",
       "textures/url_bar_texture.h",
+      "ui_elements/close_button.cc",
+      "ui_elements/close_button.h",
       "ui_elements/permanent_security_warning.cc",
       "ui_elements/permanent_security_warning.h",
       "ui_elements/textured_element.cc",