Revert 183647

chrome/browser/chromeos/login/merge_session_throttle.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/browser/chromeos/login/merge_session_throttle.h"
-
-#include "base/bind.h"
-#include "base/logging.h"
-#include "base/memory/singleton.h"
-#include "base/metrics/histogram.h"
-#include "base/string_util.h"
-#include "chrome/browser/chromeos/login/login_utils.h"
-#include "chrome/browser/google/google_util.h"
-#include "chrome/browser/net/chrome_url_request_context.h"
-#include "chrome/common/url_constants.h"
-#include "content/public/browser/browser_thread.h"
-#include "content/public/browser/render_view_host.h"
-#include "content/public/browser/resource_controller.h"
-#include "content/public/browser/web_contents.h"
-#include "net/base/net_errors.h"
-#include "net/base/net_util.h"
-#include "net/base/network_change_notifier.h"
-#include "net/url_request/url_request.h"
-#include "net/url_request/url_request_context.h"
-
-using content::BrowserThread;
-using content::RenderViewHost;
-using content::WebContents;
-
-namespace {
-
-void ShowDeleayedLoadingPage(
-    int render_process_id,
-    int render_view_id,
-    const GURL& url,
-    const chromeos::MergeSessionLoadPage::CompletionCallback& callback) {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
-
-  // Check again on UI thread and proceed if it's connected.
-  if (chromeos::UserManager::Get()->GetMergeSessionState() !=
-          chromeos::UserManager::MERGE_STATUS_IN_PROCESS) {
-    BrowserThread::PostTask(
-        BrowserThread::IO, FROM_HERE, callback);
-  } else {
-    RenderViewHost* render_view_host =
-        RenderViewHost::FromID(render_process_id, render_view_id);
-    WebContents* web_contents = render_view_host ?
-        WebContents::FromRenderViewHost(render_view_host) : NULL;
-    // There is a chance that the tab closed after we decided to show
-    // the offline page on the IO thread and before we actually show the
-    // offline page here on the UI thread.
-    if (web_contents)
-      (new chromeos::MergeSessionLoadPage(web_contents, url, callback))->Show();
-  }
-}
-
-}  // namespace
-
-MergeSessionThrottle::MergeSessionThrottle(int render_process_id,
-                                           int render_view_id,
-                                           net::URLRequest* request)
-    : render_process_id_(render_process_id),
-      render_view_id_(render_view_id),
-      request_(request) {
-}
-
-MergeSessionThrottle::~MergeSessionThrottle() {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
-}
-
-void MergeSessionThrottle::WillStartRequest(bool* defer) {
-  if (!ShouldShowMergeSessionPage(request_->url()))
-    return;
-
-  DVLOG(1) << "WillStartRequest: url=" << request_->url();
-  BrowserThread::PostTask(
-      BrowserThread::UI,
-      FROM_HERE,
-      base::Bind(
-          &ShowDeleayedLoadingPage,
-          render_process_id_,
-          render_view_id_,
-          request_->url(),
-          base::Bind(
-              &MergeSessionThrottle::OnBlockingPageComplete,
-              AsWeakPtr())));
-  *defer = true;
-}
-
-void MergeSessionThrottle::OnBlockingPageComplete() {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
-  controller()->Resume();
-}
-
-bool MergeSessionThrottle::ShouldShowMergeSessionPage(const GURL& url) const {
-  // If we are loading google properties while merge session is in progress,
-  // we will show delayed loading page instead.
-  return !net::NetworkChangeNotifier::IsOffline() &&
-         google_util::IsGoogleHostname(url.host(),
-                                       google_util::ALLOW_SUBDOMAIN) &&
-         chromeos::UserManager::Get()->GetMergeSessionState() ==
-             chromeos::UserManager::MERGE_STATUS_IN_PROCESS;
-}