Implement DeviceMotionEvent API

chromeos/accelerometer/accelerometer_reader.cc

Index: chromeos/accelerometer/accelerometer_reader.cc
diff --git a/chromeos/accelerometer/accelerometer_reader.cc b/chromeos/accelerometer/accelerometer_reader.cc
index 6e78218b71a7611d78d12514b890996cff70895b..d0bae2a9acdc280cb3c62880d5fba1d95de8f8de 100644
--- a/chromeos/accelerometer/accelerometer_reader.cc
+++ b/chromeos/accelerometer/accelerometer_reader.cc
@@ -202,18 +202,23 @@ void AccelerometerReader::Initialize(
 }
 
 void AccelerometerReader::AddObserver(Observer* observer) {
-  observers_.AddObserver(observer);
+  observers_->AddObserver(observer);
   if (has_update_)
     observer->OnAccelerometerUpdated(update_);
 }
 
 void AccelerometerReader::RemoveObserver(Observer* observer) {
-  observers_.RemoveObserver(observer);
+  observers_->RemoveObserver(observer);
+}
+
+bool AccelerometerReader::HasObserver(Observer* observer) {
+  return observers_->HasObserver(observer);
 }
 
 AccelerometerReader::AccelerometerReader()
     : has_update_(false),
       configuration_(new AccelerometerReader::Configuration()),
+      observers_(new ObserverListThreadSafe<Observer>()),
       weak_factory_(this) {
 }
 
@@ -261,7 +266,7 @@ void AccelerometerReader::OnDataRead(
                   values[configuration_->data.index[i][2]] *
                       configuration_->data.scale[i][2]);
     }
-    FOR_EACH_OBSERVER(Observer, observers_, OnAccelerometerUpdated(update_));
+    observers_->Notify(FROM_HERE, &Observer::OnAccelerometerUpdated, update_);

[flackr, 2015/02/25 23:15:16]

nit: Add TODO to move this to blocking thread (reference existing crbug). I
think this will be really easy given the threadsafe observer list.

[jonross, 2015/03/02 15:18:10]

Done.

   }
 
   // Trigger another read after the current sampling delay.