Add the chrome.bluetoothLowEnergy.setAdvertisingInterval API.

device/bluetooth/bluetooth_advertisement.h

Index: device/bluetooth/bluetooth_advertisement.h
diff --git a/device/bluetooth/bluetooth_advertisement.h b/device/bluetooth/bluetooth_advertisement.h
index ebd9ee8fd12c92ad0a58243431da27aaa17f9d2b..d0c219c427d32e2db6dd052e3a34c62bdc94a920 100644
--- a/device/bluetooth/bluetooth_advertisement.h
+++ b/device/bluetooth/bluetooth_advertisement.h
@@ -37,6 +37,8 @@ class DEVICE_BLUETOOTH_EXPORT BluetoothAdvertisement
                                          // is not registered.
     ERROR_ADVERTISEMENT_INVALID_LENGTH,  // Advertisement is not of a valid
                                          // length.
+    ERROR_INVALID_ADVERTISEMENT_INTERVAL,  // Advertisement interval specified

[scheib, 2016/09/21 19:57:00]

This is forever ChromeOS only, right? Wrap in #ifdef as the
SetAdvertisingInterval's have done?

[Rahul Chaturvedi, 2016/09/21 20:09:22]

Done.

+                                           // is out of valid range.
     INVALID_ADVERTISEMENT_ERROR_CODE
   };