base: Remove the string logging from CHECK().

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"
@@ skipping 46 matching lines @@
   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.
   // 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.";
+  // Failed to remove all user bookmarks.
+  CHECK(RemoveAllUserBookmarksIOS(browser_state_));
 
   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);
 }