Suppress the Android keyboard when selecting VR UI input fields.

chrome/browser/android/vr_shell/vr_shell.h

Index: chrome/browser/android/vr_shell/vr_shell.h
diff --git a/chrome/browser/android/vr_shell/vr_shell.h b/chrome/browser/android/vr_shell/vr_shell.h
index deb1f1fefdd8dffe017701b027c1dfb4aff4c912..69fb0d20e7d78431cceea131d17ad20f3be176aa 100644
--- a/chrome/browser/android/vr_shell/vr_shell.h
+++ b/chrome/browser/android/vr_shell/vr_shell.h
@@ -40,6 +40,7 @@ namespace vr_shell {
 
 class AndroidUiGestureTarget;
 class UiInterface;
+class UiWebContentsObserver;
 class VrCompositor;
 class VrGLThread;
 class VrInputManager;
@@ -216,6 +217,7 @@ class VrShell : public device::GvrDelegate, content::WebContentsObserver {
   std::unique_ptr<VrCompositor> ui_compositor_;
 
   std::unique_ptr<VrWebContentsObserver> vr_web_contents_observer_;
+  std::unique_ptr<UiWebContentsObserver> ui_web_contents_observer_;
 
   VrShellDelegate* delegate_provider_ = nullptr;
   base::android::ScopedJavaGlobalRef<jobject> j_vr_shell_;