Suppress exception on unregistering device sensor.

content/public/android/java/src/org/chromium/content/browser/DeviceSensors.java

Index: content/public/android/java/src/org/chromium/content/browser/DeviceSensors.java
diff --git a/content/public/android/java/src/org/chromium/content/browser/DeviceSensors.java b/content/public/android/java/src/org/chromium/content/browser/DeviceSensors.java
index 2d4a4c79fd0d6a04631029265a6aae0b8a1573a4..64efbb72270dba3a4d957fa75fda1aac81efbd53 100644
--- a/content/public/android/java/src/org/chromium/content/browser/DeviceSensors.java
+++ b/content/public/android/java/src/org/chromium/content/browser/DeviceSensors.java
@@ -686,8 +686,16 @@ class DeviceSensors implements SensorEventListener {
         @Override
         public void unregisterListener(SensorEventListener listener, int sensorType) {
             List<Sensor> sensors = mSensorManager.getSensorList(sensorType);
-            if (!sensors.isEmpty()) {
+            if (sensors.isEmpty()) {
+                return;
+            }
+            try {
                 mSensorManager.unregisterListener(listener, sensors.get(0));
+            } catch (IllegalArgumentException e) {
+                // Suppress occasional exception on Digma iDxD* devices:
+                // Receiver not registered: android.hardware.SystemSensorManager$1
+                // See crbug.com/596453.
+                Log.w(TAG, "Failed to unregister device sensor " + sensors.get(0).getName());
             }
         }
     }