Clean up WebVR RequestPresent and make callback asynchronous.

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

Index: chrome/android/java/src/org/chromium/chrome/browser/ChromeTabbedActivity.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/ChromeTabbedActivity.java b/chrome/android/java/src/org/chromium/chrome/browser/ChromeTabbedActivity.java
index 81e3f0a7f7ddf701bebd435b19ef3857e3e7ddb0..36c99355f99b19d569e91cbeb5154be31cb2711c 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/ChromeTabbedActivity.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/ChromeTabbedActivity.java
@@ -653,7 +653,7 @@ public class ChromeTabbedActivity extends ChromeActivity implements OverviewMode
                 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);
@@ -1199,7 +1199,7 @@ public class ChromeTabbedActivity extends ChromeActivity implements OverviewMode
             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);
         }