base: Remove the string logging from CHECK().

ash/common/system/tray/system_tray.cc

 // Copyright (c) 2012 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 "ash/common/system/tray/system_tray.h"
 
 #include <algorithm>
 #include <map>
 #include <vector>
 
@@ skipping 820 matching lines @@
 }
 
 void SystemTray::ActivateAndStartNavigation(const ui::KeyEvent& key_event) {
   if (!system_bubble_)
     return;
   activating_ = true;
   ActivateBubble();
   activating_ = false;
   // TODO(oshima): This is to troubleshoot the issue crbug.com/651242. Remove
   // once the root cause is fixed.
-  CHECK(system_bubble_) << " the bubble was deleted while activaing it";
+  //  the bubble was deleted while activaing it
+  CHECK(system_bubble_);
 
   views::Widget* widget = GetSystemBubble()->bubble_view()->GetWidget();
   widget->GetFocusManager()->OnKeyEvent(key_event);
 }
 
 void SystemTray::CreateKeyEventWatcher() {
   key_event_watcher_ = WmShell::Get()->CreateKeyEventWatcher();
   // mustash does not yet support KeyEventWatcher. http://crbug.com/649600.
   if (!key_event_watcher_)
     return;
@@ skipping 63 matching lines @@
           .work_area()
           .height();
   if (work_area_height > 0) {
     UMA_HISTOGRAM_CUSTOM_COUNTS(
         "Ash.SystemMenu.PercentageOfWorkAreaHeightCoveredByMenu",
         100 * bubble_view->height() / work_area_height, 1, 300, 100);
   }
 }
 
 }  // namespace ash