Support autopresenting WebVr content.

chrome/android/javatests/src/org/chromium/chrome/browser/vr_shell/WebVrTest.java

 // Copyright 2017 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.vr_shell;
 
 import static org.chromium.chrome.browser.vr_shell.VrTestRule.PAGE_LOAD_TIMEOUT_S;
 import static org.chromium.chrome.browser.vr_shell.VrUtils.POLL_TIMEOUT_SHORT_MS;
 import static org.chromium.chrome.test.util.ChromeRestriction.RESTRICTION_TYPE_VIEWER_DAYDREAM;
 import static org.chromium.chrome.test.util.ChromeRestriction.RESTRICTION_TYPE_VIEWER_NON_DAYDREAM;
@@ skipping 39 matching lines @@
     public VrTestRule mVrTestRule = new VrTestRule();
 
     private ContentViewCore mFirstTabCvc;
     private WebContents mFirstTabWebContents;
 
     @Before
     public void setUp() throws InterruptedException {
         mActivityTestRule.startMainActivityOnBlankPage();
         mFirstTabCvc = mActivityTestRule.getActivity().getActivityTab().getContentViewCore();
         mFirstTabWebContents = mActivityTestRule.getActivity().getActivityTab().getWebContents();
+        Assert.assertFalse("VrShellDelegate is in VR", VrShellDelegate.isInVr());
     }
 
     /**
      * Tests that a successful requestPresent call actually enters VR
      */
     @Test
     @SmallTest
     public void testRequestPresentEntersVr() throws InterruptedException {
         mActivityTestRule.loadUrl(
                 VrTestRule.getHtmlTestFile("test_requestPresent_enters_vr"), PAGE_LOAD_TIMEOUT_S);
@@ skipping 233 matching lines @@
     @DisableIf.Build(message = "Flaky on L crbug.com/713781",
             sdk_is_greater_than = Build.VERSION_CODES.KITKAT,
             sdk_is_less_than = Build.VERSION_CODES.M)
     public void testPresentationLocksFocus() throws InterruptedException {
         mActivityTestRule.loadUrl(
                 VrTestRule.getHtmlTestFile("test_presentation_locks_focus"), PAGE_LOAD_TIMEOUT_S);
         mVrTestRule.enterPresentationAndWait(mFirstTabCvc, mFirstTabWebContents);
         mVrTestRule.endTest(mFirstTabWebContents);
     }
 }