Enable WebVR presentation from Chrome Custom Tab

chrome/android/java/src/org/chromium/chrome/browser/ChromeActivity.java

Index: chrome/android/java/src/org/chromium/chrome/browser/ChromeActivity.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/ChromeActivity.java b/chrome/android/java/src/org/chromium/chrome/browser/ChromeActivity.java
index 8a5e48cc9fb47b52939d2e2df68ef2bbdf2cbcda..236814dd7452d1f94dc5b88accd10bc130e1aacc 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/ChromeActivity.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/ChromeActivity.java
@@ -2128,6 +2128,16 @@ public abstract class ChromeActivity extends AsyncInitializationActivity
         }
     }
 
+    @Override
+    public boolean onActivityResultWithNative(int requestCode, int resultCode, Intent intent) {
+        if (super.onActivityResultWithNative(requestCode, resultCode, intent)) return true;
+        if (requestCode == VrShellDelegate.EXIT_VR_RESULT) {
+            VrShellDelegate.onExitVRResult(resultCode);
+            return true;
+        }
+        return false;
+    }
+
     /**
      * Called when VR mode is entered using this activity. 2D UI components that steal focus or
      * draw over VR contents should be hidden in this call.