Add WaitForInterstitialReady to browser_test_utils.

chrome/browser/captive_portal/captive_portal_browsertest.cc

 // Copyright (c) 2012 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.
 
 #include <map>
 #include <set>
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/bind.h"
@@ skipping 102 matching lines @@
     "https://mock.captive.portal.long.timeout2/title2.html";
 
 // Same as kMockHttpsUrl, except the timeout happens instantly.
 const char* const kMockHttpsQuickTimeoutUrl =
     "https://mock.captive.portal.quick.timeout/title2.html";
 
 // Expected title of a tab once an HTTPS load completes, when not behind a
 // captive portal.
 const char* const kInternetConnectedTitle = "Title Of Awesomeness";
 
-// Wait until all resources have loaded in an interstitial page.
-bool WaitForInterstitialReady(content::InterstitialPage* interstitial) {
-  content::RenderFrameHost* rfh = interstitial->GetMainFrame();
-  if (!rfh)
-    return false;
-  bool load_complete = false;
-  EXPECT_TRUE(
-      content::ExecuteScriptAndExtractBool(
-          rfh,
-          "(function() {"
-          "  var done = false;"
-          "  function checkState() {"
-          "    if (!done && document.readyState == 'complete') {"
-          "      done = true;"
-          "      window.domAutomationController.send(true);"
-          "    }"
-          "  }"
-          "  checkState();"
-          "  document.addEventListener('readystatechange', checkState);"
-          "})();",
-          &load_complete));
-  return load_complete;
-}
-
 // A URL request job that hangs until FailJobs() is called.  Started jobs
 // are stored in a static class variable containing a linked list so that
 // FailJobs() can locate them.
 class URLRequestTimeoutOnDemandJob : public net::URLRequestJob,
                                      public base::NonThreadSafe {
  public:
   // net::URLRequestJob:
   void Start() override;
 
   // All the public static methods below can be called on any thread.
@@ skipping 2580 matching lines @@
 
   EXPECT_EQ(CaptivePortalTabReloader::STATE_NEEDS_RELOAD,
             GetStateOfTabReloaderAt(browser(), broken_tab_index));
 
   WaitForInterstitialAttach(broken_tab_contents);
   portal_observer.WaitForResults(1);
 
   EXPECT_EQ(SSLBlockingPage::kTypeForTesting,
             GetInterstitialType(broken_tab_contents));
 }