Remove all ReadingList entries on managed account signout.

ios/chrome/browser/signin/browser_state_data_remover.mm

 // Copyright 2014 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.
 
 #import "ios/chrome/browser/signin/browser_state_data_remover.h"
 
 #include "base/logging.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "components/prefs/pref_service.h"
 #include "components/signin/core/common/signin_pref_names.h"
 #include "ios/chrome/browser/bookmarks/bookmarks_utils.h"
 #include "ios/chrome/browser/browser_state/chrome_browser_state.h"
+#include "ios/chrome/browser/reading_list/reading_list_remover_helper.h"
 #import "ios/chrome/browser/ui/commands/UIKit+ChromeExecuteCommand.h"
 #import "ios/chrome/browser/ui/commands/clear_browsing_data_command.h"
 
 namespace {
 const int kRemoveAllDataMask = ~0;
 }
 
 BrowserStateDataRemover::BrowserStateDataRemover(
     ios::ChromeBrowserState* browser_state)
     : browser_state_(browser_state), forget_last_username_(false) {
@@ skipping 31 matching lines @@
                           mask:kRemoveAllDataMask
                     timePeriod:browsing_data::TimePeriod::ALL_TIME]);
 
   UIWindow* mainWindow = [[UIApplication sharedApplication] keyWindow];
   DCHECK(mainWindow);
   [mainWindow chromeExecuteCommand:command];
 }
 
 void BrowserStateDataRemover::NotifyWithDetails(
     const IOSChromeBrowsingDataRemover::NotificationDetails& details) {
   // Remove bookmarks once all browsing data was removed.

[sdefresne, 2017/03/20 15:09:40]

Maybe change this to "Remove bookmarks and read list data once all browsing data
was removed.".

[Olivier, 2017/03/21 10:10:15]

Done.

   // Removal of browsing data waits for the bookmark model to be loaded, so
   // there should be no issue calling the function here.
   CHECK(RemoveAllUserBookmarksIOS(browser_state_))
       << "Failed to remove all user bookmarks.";
+  reading_list_remover_helper_ =
+      base::MakeUnique<reading_list::ReadingListRemoverHelper>(browser_state_);
+  reading_list_remover_helper_->RemoveAllUserReadingListItemsIOS(
+      base::Bind(&BrowserStateDataRemover::ReadingListCleaned,
+                 base::Unretained(this), details));
+}
+
+void BrowserStateDataRemover::ReadingListCleaned(
+    const IOSChromeBrowsingDataRemover::NotificationDetails& details,
+    bool reading_list_cleaned) {
+  CHECK(reading_list_cleaned)
+      << "Failed to remove all user reading list items.";
 
   if (details.removal_mask != kRemoveAllDataMask) {
     NOTREACHED() << "Unexpected partial remove browsing data request "
                  << "(removal mask = " << details.removal_mask << ")";
     return;
   }
 
   if (forget_last_username_) {
     browser_state_->GetPrefs()->ClearPref(prefs::kGoogleServicesLastAccountId);
     browser_state_->GetPrefs()->ClearPref(prefs::kGoogleServicesLastUsername);
   }
 
   if (callback_)
     callback_.get()();
 
   base::ThreadTaskRunnerHandle::Get()->DeleteSoon(FROM_HERE, this);
 }