[vr] Hide 2D UI when entering VR for WebVR auto-presentation

chrome/android/java/src/org/chromium/chrome/browser/document/ChromeLauncherActivity.java

Index: chrome/android/java/src/org/chromium/chrome/browser/document/ChromeLauncherActivity.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/document/ChromeLauncherActivity.java b/chrome/android/java/src/org/chromium/chrome/browser/document/ChromeLauncherActivity.java
index 8c2e12ba7cf0291d1df3f3675dbe41206d755411..7868df3ab07b5c0a96f0cd59e70f3107544456b5 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/document/ChromeLauncherActivity.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/document/ChromeLauncherActivity.java
@@ -15,6 +15,7 @@ import android.os.Build;
 import android.os.Bundle;
 import android.os.StrictMode;
 import android.provider.Browser;
+import android.support.annotation.Nullable;
 import android.support.customtabs.CustomTabsIntent;
 import android.text.TextUtils;
 
@@ -49,6 +50,7 @@ import org.chromium.chrome.browser.upgrade.UpgradeActivity;
 import org.chromium.chrome.browser.util.FeatureUtilities;
 import org.chromium.chrome.browser.util.IntentUtils;
 import org.chromium.chrome.browser.util.UrlUtilities;
+import org.chromium.chrome.browser.vr_shell.VrShellDelegate;
 import org.chromium.chrome.browser.webapps.ActivityAssigner;
 import org.chromium.chrome.browser.webapps.WebappLauncherActivity;
 import org.chromium.ui.widget.Toast;
@@ -196,7 +198,11 @@ public class ChromeLauncherActivity extends Activity
 
         // Check if we should launch the ChromeTabbedActivity.
         if (!mIsCustomTabIntent && !FeatureUtilities.isDocumentMode(this)) {
-            launchTabbedMode();
+            Bundle options = null;
+            if (VrShellDelegate.isVrIntent(getIntent())) {
+                options = VrShellDelegate.getVrIntentOptions(this);
+            }
+            launchTabbedMode(options);
             finish();
             return;
         }
@@ -385,7 +391,7 @@ public class ChromeLauncherActivity extends Activity
      * Handles launching a {@link ChromeTabbedActivity}.
      */
     @SuppressLint("InlinedApi")
-    private void launchTabbedMode() {
+    private void launchTabbedMode(@Nullable Bundle options) {
         maybePrefetchDnsInBackground();
 
         Intent newIntent = new Intent(getIntent());
@@ -409,7 +415,7 @@ public class ChromeLauncherActivity extends Activity
         // This system call is often modified by OEMs and not actionable. http://crbug.com/619646.
         StrictMode.ThreadPolicy oldPolicy = StrictMode.allowThreadDiskWrites();
         try {
-            startActivity(newIntent);
+            startActivity(newIntent, options);
         } catch (SecurityException ex) {
             if (isContentScheme) {
                 Toast.makeText(