[Sensors] Implement sensor data polling

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/frame/LocalFrame.h"
 #include "modules/sensor/SensorProviderProxy.h"
 #include "platform/mojo/MojoHelper.h"
 
 using namespace device::mojom::blink;
 
 namespace blink {
 
 SensorProxy::SensorProxy(SensorType sensorType, SensorProviderProxy* provider)
     : m_type(sensorType)
     , m_mode(ReportingMode::CONTINUOUS)
     , m_provider(provider)
     , m_clientBinding(this)
     , m_state(SensorProxy::Uninitialized)
     , m_reading()
+    , m_suspended(false)
 {
 }
 
 SensorProxy::~SensorProxy()
 {
 }
 
 void SensorProxy::dispose()
 {
     m_clientBinding.Close();
@@ skipping 37 matching lines @@
     DCHECK(isInitialized());
     m_sensor->AddConfiguration(std::move(configuration), convertToBaseCallback(std::move(callback)));
 }
 
 void SensorProxy::removeConfiguration(SensorConfigurationPtr configuration, std::unique_ptr<Function<void(bool)>> callback)
 {
     DCHECK(isInitialized());
     m_sensor->RemoveConfiguration(std::move(configuration), convertToBaseCallback(std::move(callback)));
 }
 
+void SensorProxy::suspend()
+{
+    DCHECK(isInitialized());
+    if (m_suspended)
+        return;
+
+    m_sensor->Suspend();
+    m_suspended = true;
+}
+
+void SensorProxy::resume()
+{
+    DCHECK(isInitialized());
+    if (!m_suspended)
+        return;
+
+    m_sensor->Resume();
+    m_suspended = false;
+}
+
 void SensorProxy::updateInternalReading()
 {
     DCHECK(isInitialized());
     Reading* reading = static_cast<Reading*>(m_sharedBuffer.get());
     m_reading = *reading;
 }
 
 void SensorProxy::RaiseError()
 {
     handleSensorError();
@@ skipping 36 matching lines @@
         handleSensorError();
         return;
     }
 
     m_state = Initialized;
     for (Observer* observer : m_observers)
         observer->onSensorInitialized();
 }
 
 } // namespace blink