[Sensors] Implement bindings for AbsoluteOrientationSensor

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

Index: third_party/WebKit/Source/modules/sensor/SensorProxy.cpp
diff --git a/third_party/WebKit/Source/modules/sensor/SensorProxy.cpp b/third_party/WebKit/Source/modules/sensor/SensorProxy.cpp
index baa7be212caa72df4b93ed3c77bf24acfc2be9a3..68a8daa8e4c6904adf716b1c51bf8898e621ca52 100644
--- a/third_party/WebKit/Source/modules/sensor/SensorProxy.cpp
+++ b/third_party/WebKit/Source/modules/sensor/SensorProxy.cpp
@@ -34,18 +34,18 @@ void SensorProxy::dispose() {
 
 DEFINE_TRACE(SensorProxy) {
   visitor->trace(m_readingUpdater);
-  visitor->trace(m_observers);
+  visitor->trace(m_clients);
   visitor->trace(m_provider);
   PageVisibilityObserver::trace(visitor);
 }
 
-void SensorProxy::addObserver(Observer* observer) {
-  if (!m_observers.contains(observer))
-    m_observers.insert(observer);
+void SensorProxy::addClient(Client* client) {
+  if (!m_clients.contains(client))
+    m_clients.insert(client);
 }
 
-void SensorProxy::removeObserver(Observer* observer) {
-  m_observers.erase(observer);
+void SensorProxy::removeClient(Client* client) {
+  m_clients.erase(client);
 }
 
 void SensorProxy::initialize() {
@@ -129,15 +129,19 @@ void SensorProxy::updateSensorReading() {
     }
   }
 
-  m_reading = readingData;
+  if (m_reading.timestamp != readingData.timestamp) {
+    m_reading = readingData;
+    for (Client* client : m_clients)
+      client->onSensorReadingChanged();
+  }
 }
 
 void SensorProxy::notifySensorChanged(double timestamp) {
   // This notification leads to sync 'onchange' event sending, so
-  // we must cache m_observers as it can be modified within event handlers.
-  auto copy = m_observers;
-  for (Observer* observer : copy)
-    observer->onSensorReadingChanged(timestamp);
+  // we must cache m_clients as it can be modified within event handlers.
+  auto copy = m_clients;
+  for (Client* client : copy)
+    client->notifySensorChanged(timestamp);
 }
 
 void SensorProxy::RaiseError() {
@@ -174,9 +178,9 @@ void SensorProxy::handleSensorError() {
   m_defaultConfig.reset();
   m_clientBinding.Close();
 
-  for (Observer* observer : m_observers) {
-    observer->onSensorError(NotReadableError, "Could not connect to a sensor",
-                            String());
+  for (Client* client : m_clients) {
+    client->onSensorError(NotReadableError, "Could not connect to a sensor",
+                          String());
   }
 }
 
@@ -228,8 +232,8 @@ void SensorProxy::onSensorCreated(SensorInitParamsPtr params,
 
   m_state = Initialized;
 
-  for (Observer* observer : m_observers)
-    observer->onSensorInitialized();
+  for (Client* client : m_clients)
+    client->onSensorInitialized();
 }
 
 void SensorProxy::onAddConfigurationCompleted(