Upstream Chrome on iOS source code [10/11].

ios/chrome/test/app/history_test_util.mm

+// 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 "ios/chrome/test/app/history_test_util.h"
+
+#include "base/mac/bind_objc_block.h"
+#include "base/test/ios/wait_util.h"
+#include "components/browsing_data/core/browsing_data_utils.h"
+#import "ios/chrome/app/main_controller.h"
+#import "ios/chrome/app/main_controller_private.h"
+#include "ios/chrome/browser/browser_state/chrome_browser_state.h"
+#include "ios/chrome/browser/browsing_data/ios_chrome_browsing_data_remover.h"
+#include "ios/chrome/browser/callback_counter.h"
+#import "ios/chrome/test/app/chrome_test_util.h"
+
+namespace chrome_test_util {
+
+void ClearBrowsingHistory() {
+  MainController* main_controller = GetMainController();
+  ios::ChromeBrowserState* active_state = GetOriginalBrowserState();
+  scoped_refptr<CallbackCounter> callback_counter(
+      new CallbackCounter(base::BindBlock(^{
+      })));
+  callback_counter->IncrementCount();
+  __block bool did_complete = false;
+  [main_controller
+      removeBrowsingDataFromBrowserState:active_state
+                                    mask:IOSChromeBrowsingDataRemover::
+                                             REMOVE_HISTORY
+                              timePeriod:browsing_data::ALL_TIME
+                       completionHandler:^{
+                         callback_counter->DecrementCount();
+                         did_complete = true;
+                       }];
+  // TODO(crbug.com/631795): This is a workaround that will be removed soon.
+  // This code waits for success or timeout, then returns. This needs to be
+  // fixed so that failure is correctly marked here, or the caller handles
+  // waiting for the operation to complete.
+  // Wait for history to be cleared.
+  NSDate* deadline = [NSDate dateWithTimeIntervalSinceNow:4.0];
+  while (!did_complete &&
+         [[NSDate date] compare:deadline] != NSOrderedDescending) {
+    base::test::ios::SpinRunLoopWithMaxDelay(
+        base::TimeDelta::FromSecondsD(0.1));
+  }
+}
+
+}  // namespace chrome_test_util