[Sensors] Error handler in Senor class should stop the platform sensor

third_party/WebKit/Source/modules/sensor/SensorProxy.cpp

 // 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 "modules/sensor/SensorProxy.h"
 
 #include "core/dom/Document.h"
 #include "core/frame/LocalFrame.h"
 #include "modules/sensor/SensorProviderProxy.h"
 #include "modules/sensor/SensorReadingUpdater.h"
@@ skipping 160 matching lines @@
   reading_ = device::SensorReading();
 
   // The m_sensor.reset() will release all callbacks and its bound parameters,
   // therefore, handleSensorError accepts messages by value.
   sensor_.reset();
   shared_buffer_.reset();
   shared_buffer_handle_.reset();
   default_config_.reset();
   client_binding_.Close();
 
-  for (Observer* observer : observers_) {
+  auto copy = observers_;
+  for (Observer* observer : copy) {
     observer->OnSensorError(kNotReadableError, "Could not connect to a sensor",
                             String());
   }
 }
 
 void SensorProxy::OnSensorCreated(SensorInitParamsPtr params,
                                   SensorClientRequest client_request) {
   DCHECK_EQ(kInitializing, state_);
   if (!params) {
     HandleSensorError();
@@ skipping 79 matching lines @@
   const device::OneWriterSeqLock& seqlock = buffer->seqlock.value();
   auto version = seqlock.ReadBegin();
   auto reading_data = buffer->reading;
   if (seqlock.ReadRetry(version))
     return false;
   result = reading_data;
   return true;
 }
 
 }  // namespace blink