base: Remove the string logging from CHECK().

ash/common/system/chromeos/power/power_status.cc

 // Copyright (c) 2013 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/chromeos/power/power_status.h"
 
 #include <algorithm>
 #include <cmath>
 
 #include "ash/common/material_design/material_design_controller.h"
@@ skipping 176 matching lines @@
   g_power_status = NULL;
 }
 
 // static
 bool PowerStatus::IsInitialized() {
   return g_power_status != NULL;
 }
 
 // static
 PowerStatus* PowerStatus::Get() {
-  CHECK(g_power_status) << "PowerStatus::Get() called before Initialize().";
+  // PowerStatus::Get() called before Initialize().
+  CHECK(g_power_status);
   return g_power_status;
 }
 
 // static
 bool PowerStatus::ShouldDisplayBatteryTime(const base::TimeDelta& time) {
   return time >= base::TimeDelta::FromMinutes(1) &&
          time.InSeconds() <= kMaxBatteryTimeToDisplaySec;
 }
 
 // static
@@ skipping 301 matching lines @@
 
 void PowerStatus::PowerChanged(
     const power_manager::PowerSupplyProperties& proto) {
   proto_ = proto;
   SanitizeProto(&proto_);
   for (auto& observer : observers_)
     observer.OnPowerStatusChanged();
 }
 
 }  // namespace ash