Clean up WebVR RequestPresent and make callback asynchronous.

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

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 package org.chromium.chrome.browser;
 
 import android.annotation.SuppressLint;
 import android.annotation.TargetApi;
 import android.app.Activity;
 import android.app.ActivityManager;
@@ skipping 635 matching lines @@
                 // away in Recents. http://crbug.com/626629
                 boolean ignoreIncognitoFiles = !hadCipherData;
                 mTabModelSelectorImpl.loadState(ignoreIncognitoFiles);
             }
 
             mIntentWithEffect = false;
             if ((mIsOnFirstRun || getSavedInstanceState() == null) && intent != null) {
                 if (mVrShellDelegate.isVrIntent(intent)) {
                     // TODO(mthiesse): Improve startup when started from a VR intent. Right now
                     // we launch out of VR, partially load out of VR, then switch into VR.
-                    mVrShellDelegate.enterVRIfNecessary(false);
+                    mVrShellDelegate.enterVRIfNecessary();
                 } else if (!mIntentHandler.shouldIgnoreIntent(ChromeTabbedActivity.this, intent)) {
                     mIntentWithEffect = mIntentHandler.onNewIntent(ChromeTabbedActivity.this,
                             intent);
                 }
             }
 
             mCreatedTabOnStartup = getCurrentTabModel().getCount() > 0
                     || mTabModelSelectorImpl.getRestoredTabCount() > 0
                     || mIntentWithEffect;
 
@@ skipping 525 matching lines @@
                 getToolbarManager().setUrlBarFocus(true);
             }
         } else if (id == R.id.downloads_menu_id) {
             DownloadUtils.showDownloadManager(this, currentTab);
             RecordUserAction.record("MobileMenuDownloadManager");
         } else if (id == R.id.open_recently_closed_tab) {
             TabModel currentModel = mTabModelSelectorImpl.getCurrentModel();
             if (!currentModel.isIncognito()) currentModel.openMostRecentlyClosedTab();
             RecordUserAction.record("MobileTabClosedUndoShortCut");
         } else if (id == R.id.enter_vr_id) {
-            mVrShellDelegate.enterVRIfNecessary(false);
+            mVrShellDelegate.enterVRIfNecessary();
         } else {
             return super.onMenuOrKeyboardAction(id, fromMenu);
         }
         return true;
     }
 
     private void recordBackPressedUma(String logMessage, @BackPressedResult int action) {
         Log.i(TAG, "Back pressed: " + logMessage);
         RecordHistogram.recordEnumeratedHistogram(
                 "Android.Activity.ChromeTabbedActivity.SystemBackAction",
@@ skipping 496 matching lines @@
 
         ActivityManager manager = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);
         for (AppTask task : manager.getAppTasks()) {
             RecentTaskInfo info = DocumentUtils.getTaskInfoFromTask(task);
             if (info == null) continue;
             if (info.id == sMergedInstanceTaskId) return true;
         }
         return false;
     }
 }