Fix SettingsTestCase.test[Metrics|Breakpad]Reporting on Official

ios/chrome/app/application_delegate/metrics_mediator.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.
 
 #import "ios/chrome/app/application_delegate/metrics_mediator.h"
 
 #include "base/mac/bind_objc_block.h"
 #include "base/metrics/histogram_macros.h"
 #include "base/metrics/user_metrics_action.h"
 #include "base/strings/sys_string_conversions.h"
@@ skipping 330 matching lines @@
 }
 
 #pragma mark - CRConnectionTypeObserverBridge implementation
 
 - (void)connectionTypeChanged:(net::NetworkChangeNotifier::ConnectionType)type {
   BOOL wwanEnabled = net::NetworkChangeNotifier::IsConnectionCellular(type);
   // Currently the MainController only cares about WWAN state for the metrics
   // reporting preference.  If it's disabled, or the wifi-only preference is
   // not set, we don't care.  In fact, we should not even be getting this call.
   DCHECK([self isMetricsReportingEnabledWifiOnly]);
+  DCHECK(connectionTypeObserverBridge_);
   // |wwanEnabled| is true if a cellular connection such as EDGE or GPRS is
   // used. Otherwise, either there is no connection available, or another link
   // (such as WiFi) is used.
   if (wwanEnabled) {
     // If WWAN mode is on, wifi-only prefs should be disabled.
     // For the crash reporter, we still want to record the crashes.
     [self setBreakpadUploadingEnabled:NO];
     [self setReporting:NO];
   } else if ([self areMetricsEnabled]) {
     // Double-check that the metrics reporting preference is enabled.
@@ skipping 26 matching lines @@
 }
 
 - (BOOL)isMetricsReportingEnabledWifiOnly {
   return GetApplicationContext()->GetLocalState()->GetBoolean(
              metrics::prefs::kMetricsReportingEnabled) &&
          GetApplicationContext()->GetLocalState()->GetBoolean(
              prefs::kMetricsReportingWifiOnly);
 }
 
 @end