The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/be62e9d349e2570467d4d86326d9b8f31bedc0fc

commit be62e9d349e2570467d4d86326d9b8f31bedc0fc
Author: dougt <dougt@chromium.org>
Date: Wed Feb 01 16:13:55 2017

Implement WebBluetooth descriptor.writeValue()

A GATT Descriptor provides further information about a characteristic's
value. Writing values to a GATT Descriptor can be used to control certain
behaviors of the given device.

For each characteristic there may be many descriptors as defined by
https://webbluetoothcg.github.io/web-bluetooth/#bluetoothremotegattdescriptor.

In  Bug 660699 , we added support for accessing descriptors from characteristics.

In  Bug 668837 , we added support for reads descriptors.

In this CL, we add support for writing the value of the descriptor.

BUG= 668838 
R=scheib

Review-Url: https://codereview.chromium.org/2654403002
Cr-Commit-Position: refs/heads/master@{#447525}

[modify] https://crrev.com/be62e9d349e2570467d4d86326d9b8f31bedc0fc/content/browser/bluetooth/bluetooth_metrics.cc
[modify] https://crrev.com/be62e9d349e2570467d4d86326d9b8f31bedc0fc/content/browser/bluetooth/bluetooth_metrics.h
[modify] https://crrev.com/be62e9d349e2570467d4d86326d9b8f31bedc0fc/content/browser/bluetooth/web_bluetooth_service_impl.cc
[modify] https://crrev.com/be62e9d349e2570467d4d86326d9b8f31bedc0fc/content/browser/bluetooth/web_bluetooth_service_impl.h
[modify] https://crrev.com/be62e9d349e2570467d4d86326d9b8f31bedc0fc/content/shell/browser/layout_test/layout_test_bluetooth_adapter_provider.cc
[modify] https://crrev.com/be62e9d349e2570467d4d86326d9b8f31bedc0fc/content/shell/browser/layout_test/layout_test_bluetooth_adapter_provider.h
[rename] https://crrev.com/be62e9d349e2570467d4d86326d9b8f31bedc0fc/third_party/WebKit/LayoutTests/bluetooth/descriptor/readValue/descriptor-is-blocklisted.html
[modify] https://crrev.com/be62e9d349e2570467d4d86326d9b8f31bedc0fc/third_party/WebKit/LayoutTests/bluetooth/descriptor/readValue/gen-descriptor-is-removed.html
[modify] https://crrev.com/be62e9d349e2570467d4d86326d9b8f31bedc0fc/third_party/WebKit/LayoutTests/bluetooth/descriptor/readValue/gen-io-op-fails.html
[modify] https://crrev.com/be62e9d349e2570467d4d86326d9b8f31bedc0fc/third_party/WebKit/LayoutTests/bluetooth/descriptor/readValue/gen-io-op-garbage-collection-ran-during-success.html
[modify] https://crrev.com/be62e9d349e2570467d4d86326d9b8f31bedc0fc/third_party/WebKit/LayoutTests/bluetooth/descriptor/readValue/gen-io-op-reconnect-during-error.html
[modify] https://crrev.com/be62e9d349e2570467d4d86326d9b8f31bedc0fc/third_party/WebKit/LayoutTests/bluetooth/descriptor/readValue/gen-service-is-removed.html
[copy] https://crrev.com/be62e9d349e2570467d4d86326d9b8f31bedc0fc/third_party/WebKit/LayoutTests/bluetooth/descriptor/writeValue/descriptor-is-blocklisted.html
[add] https://crrev.com/be62e9d349e2570467d4d86326d9b8f31bedc0fc/third_party/WebKit/LayoutTests/bluetooth/descriptor/writeValue/gen-descriptor-is-removed.html
[add] https://crrev.com/be62e9d349e2570467d4d86326d9b8f31bedc0fc/third_party/WebKit/LayoutTests/bluetooth/descriptor/writeValue/gen-io-op-device-disconnects-before.html
[add] https://crrev.com/be62e9d349e2570467d4d86326d9b8f31bedc0fc/third_party/WebKit/LayoutTests/bluetooth/descriptor/writeValue/gen-io-op-device-disconnects-during-error.html
[add] https://crrev.com/be62e9d349e2570467d4d86326d9b8f31bedc0fc/third_party/WebKit/LayoutTests/bluetooth/descriptor/writeValue/gen-io-op-device-disconnects-during-success.html
[add] https://crrev.com/be62e9d349e2570467d4d86326d9b8f31bedc0fc/third_party/WebKit/LayoutTests/bluetooth/descriptor/writeValue/gen-io-op-device-reconnects-during-error.html
[add] https://crrev.com/be62e9d349e2570467d4d86326d9b8f31bedc0fc/third_party/WebKit/LayoutTests/bluetooth/descriptor/writeValue/gen-io-op-device-reconnects-during-success.html
[add] https://crrev.com/be62e9d349e2570467d4d86326d9b8f31bedc0fc/third_party/WebKit/LayoutTests/bluetooth/descriptor/writeValue/gen-io-op-disconnect-called-before.html
[add] https://crrev.com/be62e9d349e2570467d4d86326d9b8f31bedc0fc/third_party/WebKit/LayoutTests/bluetooth/descriptor/writeValue/gen-io-op-disconnect-called-during-error.html
[add] https://crrev.com/be62e9d349e2570467d4d86326d9b8f31bedc0fc/third_party/WebKit/LayoutTests/bluetooth/descriptor/writeValue/gen-io-op-disconnect-called-during-success.html
[add] https://crrev.com/be62e9d349e2570467d4d86326d9b8f31bedc0fc/third_party/WebKit/LayoutTests/bluetooth/descriptor/writeValue/gen-io-op-fails.html
[add] https://crrev.com/be62e9d349e2570467d4d86326d9b8f31bedc0fc/third_party/WebKit/LayoutTests/bluetooth/descriptor/writeValue/gen-io-op-garbage-collection-ran-during-error.html
[add] https://crrev.com/be62e9d349e2570467d4d86326d9b8f31bedc0fc/third_party/WebKit/LayoutTests/bluetooth/descriptor/writeValue/gen-io-op-garbage-collection-ran-during-success.html
[add] https://crrev.com/be62e9d349e2570467d4d86326d9b8f31bedc0fc/third_party/WebKit/LayoutTests/bluetooth/descriptor/writeValue/gen-io-op-reconnect-during-error.html
[add] https://crrev.com/be62e9d349e2570467d4d86326d9b8f31bedc0fc/third_party/WebKit/LayoutTests/bluetooth/descriptor/writeValue/gen-io-op-reconnect-during-success.html
[add] https://crrev.com/be62e9d349e2570467d4d86326d9b8f31bedc0fc/third_party/WebKit/LayoutTests/bluetooth/descriptor/writeValue/gen-service-is-removed.html
[add] https://crrev.com/be62e9d349e2570467d4d86326d9b8f31bedc0fc/third_party/WebKit/LayoutTests/bluetooth/descriptor/writeValue/value-too-long.html
[add] https://crrev.com/be62e9d349e2570467d4d86326d9b8f31bedc0fc/third_party/WebKit/LayoutTests/bluetooth/descriptor/writeValue/write-succeeds.html
[add] https://crrev.com/be62e9d349e2570467d4d86326d9b8f31bedc0fc/third_party/WebKit/LayoutTests/bluetooth/descriptor/writeValue/write-updates-value.html
[delete] https://crrev.com/f2b188baeb2938427bf58b6ff6b61840f325055b/third_party/WebKit/LayoutTests/bluetooth/script-tests/descriptor/descriptor-is-blocklisted.js
[modify] https://crrev.com/be62e9d349e2570467d4d86326d9b8f31bedc0fc/third_party/WebKit/LayoutTests/bluetooth/script-tests/descriptor/descriptor-is-removed.js
[modify] https://crrev.com/be62e9d349e2570467d4d86326d9b8f31bedc0fc/third_party/WebKit/LayoutTests/bluetooth/script-tests/descriptor/io-op-device-disconnects-before.js
[modify] https://crrev.com/be62e9d349e2570467d4d86326d9b8f31bedc0fc/third_party/WebKit/LayoutTests/bluetooth/script-tests/descriptor/io-op-device-disconnects-during-error.js
[modify] https://crrev.com/be62e9d349e2570467d4d86326d9b8f31bedc0fc/third_party/WebKit/LayoutTests/bluetooth/script-tests/descriptor/io-op-device-disconnects-during-success.js
[modify] https://crrev.com/be62e9d349e2570467d4d86326d9b8f31bedc0fc/third_party/WebKit/LayoutTests/bluetooth/script-tests/descriptor/io-op-device-reconnects-during-error.js
[modify] https://crrev.com/be62e9d349e2570467d4d86326d9b8f31bedc0fc/third_party/WebKit/LayoutTests/bluetooth/script-tests/descriptor/io-op-device-reconnects-during-success.js
[modify] https://crrev.com/be62e9d349e2570467d4d86326d9b8f31bedc0fc/third_party/WebKit/LayoutTests/bluetooth/script-tests/descriptor/io-op-disconnect-called-before.js
[modify] https://crrev.com/be62e9d349e2570467d4d86326d9b8f31bedc0fc/third_party/WebKit/LayoutTests/bluetooth/script-tests/descriptor/io-op-disconnect-called-during-error.js
[modify] https://crrev.com/be62e9d349e2570467d4d86326d9b8f31bedc0fc/third_party/WebKit/LayoutTests/bluetooth/script-tests/descriptor/io-op-disconnect-called-during-success.js
[modify] https://crrev.com/be62e9d349e2570467d4d86326d9b8f31bedc0fc/third_party/WebKit/LayoutTests/bluetooth/script-tests/descriptor/io-op-fails.js
[modify] https://crrev.com/be62e9d349e2570467d4d86326d9b8f31bedc0fc/third_party/WebKit/LayoutTests/bluetooth/script-tests/descriptor/io-op-garbage-collection-ran-during-error.js
[modify] https://crrev.com/be62e9d349e2570467d4d86326d9b8f31bedc0fc/third_party/WebKit/LayoutTests/bluetooth/script-tests/descriptor/io-op-garbage-collection-ran-during-success.js
[modify] https://crrev.com/be62e9d349e2570467d4d86326d9b8f31bedc0fc/third_party/WebKit/LayoutTests/bluetooth/script-tests/descriptor/io-op-reconnect-during-error.js
[modify] https://crrev.com/be62e9d349e2570467d4d86326d9b8f31bedc0fc/third_party/WebKit/LayoutTests/bluetooth/script-tests/descriptor/io-op-reconnect-during-success.js
[modify] https://crrev.com/be62e9d349e2570467d4d86326d9b8f31bedc0fc/third_party/WebKit/LayoutTests/bluetooth/script-tests/descriptor/service-is-removed.js
[modify] https://crrev.com/be62e9d349e2570467d4d86326d9b8f31bedc0fc/third_party/WebKit/Source/modules/bluetooth/BluetoothRemoteGATTDescriptor.cpp
[modify] https://crrev.com/be62e9d349e2570467d4d86326d9b8f31bedc0fc/third_party/WebKit/Source/modules/bluetooth/BluetoothRemoteGATTDescriptor.h
[modify] https://crrev.com/be62e9d349e2570467d4d86326d9b8f31bedc0fc/third_party/WebKit/public/platform/modules/bluetooth/web_bluetooth.mojom