Merge //components/browsing_data_ui into //components/browsing_data/core

components/browsing_data_ui/history_notice_utils.cc

-// Copyright 2016 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 "components/browsing_data_ui/history_notice_utils.h"
-
-#include "base/bind.h"
-#include "base/callback.h"
-#include "base/location.h"
-#include "base/single_thread_task_runner.h"
-#include "base/strings/stringprintf.h"
-#include "base/threading/thread_task_runner_handle.h"
-#include "components/history/core/browser/web_history_service.h"
-#include "components/sync/driver/sync_service.h"
-#include "components/version_info/version_info.h"
-
-namespace {
-
-// Merges several asynchronous boolean callbacks into one that returns a boolean
-// product of their responses. Deletes itself when done.
-class MergeBooleanCallbacks {
- public:
-  // Constructor. Upon receiving |expected_call_count| calls to |RunCallback|,
-  // |target_callback| will be run with the boolean product of their results.
-  MergeBooleanCallbacks(
-      int expected_call_count,
-      const base::Callback<void(bool)>& target_callback)
-      : expected_call_count_(expected_call_count),
-        target_callback_(target_callback),
-        final_response_(true),
-        call_count_(0) {}
-
-  // This method is to be bound to all asynchronous callbacks which we want
-  // to merge.
-  void RunCallback(bool response) {
-    final_response_ &= response;
-
-    if (++call_count_ < expected_call_count_)
-      return;
-
-    target_callback_.Run(final_response_);
-    base::ThreadTaskRunnerHandle::Get()->DeleteSoon(FROM_HERE, this);
-  }
-
- private:
-  int expected_call_count_;
-  base::Callback<void(bool)> target_callback_;
-  bool final_response_;
-  int call_count_;
-};
-
-}  // namespace
-
-namespace browsing_data_ui {
-
-namespace testing {
-
-bool g_override_other_forms_of_browsing_history_query = false;
-
-}  // namespace testing
-
-void ShouldShowNoticeAboutOtherFormsOfBrowsingHistory(
-    const sync_driver::SyncService* sync_service,
-    history::WebHistoryService* history_service,
-    base::Callback<void(bool)> callback) {
-  if (!sync_service ||
-      !sync_service->IsSyncActive() ||
-      !sync_service->GetActiveDataTypes().Has(
-          syncer::HISTORY_DELETE_DIRECTIVES) ||
-      sync_service->IsUsingSecondaryPassphrase() ||
-      !history_service) {
-    callback.Run(false);
-    return;
-  }
-
-  history_service->QueryWebAndAppActivity(callback);
-}
-
-void ShouldPopupDialogAboutOtherFormsOfBrowsingHistory(
-    const sync_driver::SyncService* sync_service,
-    history::WebHistoryService* history_service,
-    version_info::Channel channel,
-    base::Callback<void(bool)> callback) {
-  // If the query for other forms of browsing history is overriden for testing,
-  // the conditions are identical with
-  // ShouldShowNoticeAboutOtherFormsOfBrowsingHistory.
-  if (testing::g_override_other_forms_of_browsing_history_query) {
-    ShouldShowNoticeAboutOtherFormsOfBrowsingHistory(
-        sync_service, history_service, callback);
-    return;
-  }
-
-  if (!sync_service ||
-      !sync_service->IsSyncActive() ||
-      !sync_service->GetActiveDataTypes().Has(
-          syncer::HISTORY_DELETE_DIRECTIVES) ||
-      sync_service->IsUsingSecondaryPassphrase() ||
-      !history_service) {
-    callback.Run(false);
-    return;
-  }
-
-  // Return the boolean product of QueryWebAndAppActivity and
-  // QueryOtherFormsOfBrowsingHistory. MergeBooleanCallbacks deletes itself
-  // after processing both callbacks.
-  MergeBooleanCallbacks* merger = new MergeBooleanCallbacks(2, callback);
-  history_service->QueryWebAndAppActivity(base::Bind(
-      &MergeBooleanCallbacks::RunCallback, base::Unretained(merger)));
-  history_service->QueryOtherFormsOfBrowsingHistory(
-      channel,
-      base::Bind(
-          &MergeBooleanCallbacks::RunCallback, base::Unretained(merger)));
-}
-
-}  // namespace browsing_data_ui