Autopresent WebVR content in CCT if it was opened by a Daydream Intent

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 e1e1fb7853516077a6bae0db7de27a2ac3bc20d1..4014645eab8873b433cd87a4cef6b146c9a52098 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
@@ -78,6 +78,8 @@ public class VrShellDelegate implements ApplicationStatus.ActivityStateListener,
     @IntDef({VR_NOT_AVAILABLE, VR_CARDBOARD, VR_DAYDREAM})
     private @interface VrSupportLevel {}
 
+    private static final String DAYDREAM_VR_EXTRA = "android.intent.extra.VR_LAUNCH";
+
     // Linter and formatter disagree on how the line below should be formatted.
     /* package */
     static final String VR_ENTRY_RESULT_ACTION =
@@ -257,6 +259,13 @@ public class VrShellDelegate implements ApplicationStatus.ActivityStateListener,
         unregisterDaydreamIntent(api);
     }
 
+    /**
+     * Whether or not the intent is a Daydream VR Intent.
+     */
+    public static boolean isDaydreamVrIntent(Intent intent) {
+        return intent.getBooleanExtra(DAYDREAM_VR_EXTRA, false);
+    }
+
     @CalledByNative
     private static VrShellDelegate getInstance() {
         Activity activity = ApplicationStatus.getLastTrackedFocusedActivity();
@@ -689,6 +698,11 @@ public class VrShellDelegate implements ApplicationStatus.ActivityStateListener,
         mListeningForWebVrActivate = listening;
         if (listening) {
             registerDaydreamIntent(mVrDaydreamApi, mActivity);
+            if (mActivity.shouldAutoPresent()) {
+                // Dispatch a vrdisplayactivate event to trigger WebVR page calling requestPresent.
+                // This should start WebVR presentation.
+                nativeDisplayActivate(mNativeVrShellDelegate);
+            }
         } else {
             unregisterDaydreamIntent(mVrDaydreamApi);
         }