The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/63c7ac485b91957bd4fb2a1ff743cbf43f526717

commit 63c7ac485b91957bd4fb2a1ff743cbf43f526717
Author: juncai <juncai@chromium.org>
Date: Fri Mar 31 04:52:57 2017

Move Bluetooth.Web.FunctionCall.Count UMA from browser to WebKit

Based on the discussion:
https://codereview.chromium.org/2752663002/diff/140001/content/browser/bluetooth/web_bluetooth_service_impl.cc

UMAWebBluetoothFunction::REMOTE_GATT_SERVER_DISCONNECT UMA was intended
to count how often JavaScript called disconnect, but with the change of
the above CL, it also counts when the device disconnects and the
browser is informed, or for any other reason when the client is
disconnected. So we think moving Bluetooth.Web.FunctionCall.Count UMA
from browser to WebKit makes sense since those UMA counts the function
calls on the renderer side.

BUG= 703970 

Review-Url: https://codereview.chromium.org/2771893002
Cr-Commit-Position: refs/heads/master@{#461038}

[modify] https://crrev.com/63c7ac485b91957bd4fb2a1ff743cbf43f526717/content/browser/bluetooth/bluetooth_metrics.cc
[modify] https://crrev.com/63c7ac485b91957bd4fb2a1ff743cbf43f526717/content/browser/bluetooth/bluetooth_metrics.h
[modify] https://crrev.com/63c7ac485b91957bd4fb2a1ff743cbf43f526717/content/browser/bluetooth/web_bluetooth_service_impl.cc
[modify] https://crrev.com/63c7ac485b91957bd4fb2a1ff743cbf43f526717/third_party/WebKit/Source/core/frame/UseCounter.h
[modify] https://crrev.com/63c7ac485b91957bd4fb2a1ff743cbf43f526717/third_party/WebKit/Source/modules/bluetooth/BluetoothRemoteGATTCharacteristic.idl
[modify] https://crrev.com/63c7ac485b91957bd4fb2a1ff743cbf43f526717/third_party/WebKit/Source/modules/bluetooth/BluetoothRemoteGATTDescriptor.idl
[modify] https://crrev.com/63c7ac485b91957bd4fb2a1ff743cbf43f526717/third_party/WebKit/Source/modules/bluetooth/BluetoothRemoteGATTServer.idl
[modify] https://crrev.com/63c7ac485b91957bd4fb2a1ff743cbf43f526717/third_party/WebKit/Source/modules/bluetooth/BluetoothRemoteGATTService.idl
[modify] https://crrev.com/63c7ac485b91957bd4fb2a1ff743cbf43f526717/tools/metrics/histograms/histograms.xml

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/27217b8880dcd75b1b22e98275ea0dab4663454e

commit 27217b8880dcd75b1b22e98275ea0dab4663454e
Author: scheib <scheib@chromium.org>
Date: Wed May 10 06:05:49 2017

Mark BluetoothDeviceConnectGATT UMA enum obsolete.

BUG= 703970 

Review-Url: https://codereview.chromium.org/2865403004
Cr-Commit-Position: refs/heads/master@{#470495}

[modify] https://crrev.com/27217b8880dcd75b1b22e98275ea0dab4663454e/tools/metrics/histograms/enums.xml