[ChromeDriver] Send DOM.getDocument after each DOM.documentUpdated.

chrome/test/chromedriver/navigation_tracker.cc

 // Copyright (c) 2013 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 "chrome/test/chromedriver/navigation_tracker.h"
 
 #include "base/logging.h"
 #include "base/stringprintf.h"
 #include "base/values.h"
 
 NavigationTracker::NavigationTracker() {}
 
 NavigationTracker::~NavigationTracker() {}
 
+Status NavigationTracker::Init(DevToolsClient* client) {
+  // Enable page domain notifications to allow tracking navigation state.
+  base::DictionaryValue params;
+  DCHECK(client);
+  return client->SendCommand("Page.enable", params);
+}
+
 bool NavigationTracker::IsPendingNavigation(const std::string& frame_id) {
   return frame_state_[frame_id].IsPendingNavigation();
 }
 
 void NavigationTracker::OnEvent(const std::string& method,
                                 const base::DictionaryValue& params) {
   if (method == "Page.frameStartedLoading" ||
       method == "Page.frameStoppedLoading" ||
       method == "Page.frameScheduledNavigation" ||
       method == "Page.frameClearedScheduledNavigation") {
@@ skipping 22 matching lines @@
   return (state_bitfield_ & (LOADING | SCHEDULED)) != 0;
 }
 
 void NavigationTracker::NavigationState::SetFlags(const Mask mask) {
   state_bitfield_ |= mask;
 }
 
 void NavigationTracker::NavigationState::ClearFlags(const Mask mask) {
   state_bitfield_ &= ~mask;
 }