bluetoothLowEnergy: Send onServiceAdded after all characteristics are discovered

bluetoothLowEnergy: Send onServiceAdded after all characteristics are discovered

This CL makes the following changes:

  - Add support for the new "Characteristics" and "Descriptors" properties
    exposed under org.bluez.GattService1 and org.bluez.GattCharacteristic1,
    respectively.

  - Add device::BluetoothGattService::Observer::GattDiscoveryCompleteForService
    event, which gets called after the first PropertiesChanged signal is
    received for the "Characteristics" property of a service.

  - Change BluetoothLowEnergyEventRouter, so that it sends the "onServiceAdded"
    event not in GattServiceAdded but in GattDiscoveryCompleteForService.

BUG=394537
TEST=browser_tests:BluetoothLowEnergyApiTest,
device_unittests:BluetoothGattChromeOSTest

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=284955

[keybuk, 2014-07-22 17:57:26]

lgtm

[armansito, 2014-07-22 22:16:36]

The CQ bit was checked by armansito@chromium.org

[commit-bot: I haz the power, 2014-07-22 22:18:21]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/armansito@chromium.org/402303002/1

[commit-bot: I haz the power, 2014-07-23 02:07:42]

FYI, CQ is re-trying this CL (attempt #1).
The failing builders are:
  win_gpu_triggered_tests on tryserver.chromium.gpu
(http://build.chromium.org/p/tryserver.chromium.gpu/builders/win_gpu_triggered...)

[commit-bot: I haz the power, 2014-07-23 04:08:35]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2014-07-23 04:08:36]

Try jobs failed on following builders:
  win_gpu_triggered_tests on tryserver.chromium.gpu
(http://build.chromium.org/p/tryserver.chromium.gpu/builders/win_gpu_triggered...)

[armansito, 2014-07-23 04:32:24]

The CQ bit was checked by armansito@chromium.org

[commit-bot: I haz the power, 2014-07-23 04:34:03]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/armansito@chromium.org/402303002/1

[commit-bot: I haz the power, 2014-07-23 05:49:23]

FYI, CQ is re-trying this CL (attempt #1).
The failing builders are:
  win_gpu_triggered_tests on tryserver.chromium.gpu
(http://build.chromium.org/p/tryserver.chromium.gpu/builders/win_gpu_triggered...)

[commit-bot: I haz the power, 2014-07-23 06:44:51]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2014-07-23 06:44:55]

Try jobs failed on following builders:
  win_gpu_triggered_tests on tryserver.chromium.gpu
(http://build.chromium.org/p/tryserver.chromium.gpu/builders/win_gpu_triggered...)

[armansito, 2014-07-23 06:45:43]

The CQ bit was checked by armansito@chromium.org

[commit-bot: I haz the power, 2014-07-23 06:48:11]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/armansito@chromium.org/402303002/1

[commit-bot: I haz the power, 2014-07-23 07:44:04]

FYI, CQ is re-trying this CL (attempt #1).
The failing builders are:
  win_gpu_triggered_tests on tryserver.chromium.gpu
(http://build.chromium.org/p/tryserver.chromium.gpu/builders/win_gpu_triggered...)

[commit-bot: I haz the power, 2014-07-23 08:27:55]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2014-07-23 08:27:56]

Try jobs failed on following builders:
  win_gpu_triggered_tests on tryserver.chromium.gpu
(http://build.chromium.org/p/tryserver.chromium.gpu/builders/win_gpu_triggered...)

[armansito, 2014-07-23 16:45:35]

The CQ bit was checked by armansito@chromium.org

[commit-bot: I haz the power, 2014-07-23 16:47:04]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/armansito@chromium.org/402303002/1

[commit-bot: I haz the power, 2014-07-23 16:49:19]

Change committed as 284955