[VrShell] Mask system ui flags before checking.

chrome/android/java/src/org/chromium/chrome/browser/vr_shell/VrShellDelegate.java

Index: chrome/android/java/src/org/chromium/chrome/browser/vr_shell/VrShellDelegate.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/vr_shell/VrShellDelegate.java b/chrome/android/java/src/org/chromium/chrome/browser/vr_shell/VrShellDelegate.java
index f6e64a4cc65b62b71e712a31e74195dfaa677c0c..b205865c779640f656627121684b20f67e6f0aa3 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/vr_shell/VrShellDelegate.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/vr_shell/VrShellDelegate.java
@@ -535,7 +535,9 @@ public class VrShellDelegate implements ApplicationStatus.ActivityStateListener,
     private boolean isWindowModeCorrectForVr() {
         int flags = mActivity.getWindow().getDecorView().getSystemUiVisibility();
         int orientation = mActivity.getResources().getConfiguration().orientation;
-        return flags == VR_SYSTEM_UI_FLAGS && orientation == Configuration.ORIENTATION_LANDSCAPE;
+        // Mask the flags to only those that we care about.
+        return (flags & VR_SYSTEM_UI_FLAGS) == VR_SYSTEM_UI_FLAGS
+                && orientation == Configuration.ORIENTATION_LANDSCAPE;
     }
 
     private void setWindowModeForVr(int requestedOrientation) {