[sensors] Don't call OnSensorReadingChanged if client's suspended.

device/generic_sensor/platform_sensor.cc

 // 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 "device/generic_sensor/platform_sensor.h"
 
 #include <utility>
 
 #include "device/generic_sensor/platform_sensor_configuration.h"
 #include "device/generic_sensor/platform_sensor_provider.h"
@@ skipping 63 matching lines @@
   DCHECK(client);
   clients_.RemoveObserver(client);
   auto client_entry = config_map_.find(client);
   if (client_entry != config_map_.end()) {
     config_map_.erase(client_entry);
     UpdateSensorInternal(config_map_);
   }
 }
 
 void PlatformSensor::NotifySensorReadingChanged() {
-  FOR_EACH_OBSERVER(Client, clients_, OnSensorReadingChanged());
+  using ClientsList = decltype(clients_);
+  ClientsList::Iterator it(&clients_);
+  Client* client;
+  while ((client = it.GetNext()) != nullptr) {
+    if (!client->IsNotificationSuspended())
+      client->OnSensorReadingChanged();
+  }
 }
 
 void PlatformSensor::NotifySensorError() {
   FOR_EACH_OBSERVER(Client, clients_, OnSensorError());
 }
 
 }  // namespace device