Reland "Reland "[Bluetooth][WinRT] Implement Obtaining Gatt Descriptors""

This reverts commit b050a38a869f3259cbef8c3862b7ad0c06f7f01e.

Reason for revert: https://crrev.com/c/1161883 fixes the device_unittests breakage triggered by this CL.

Original change's description:
> Revert "Reland "[Bluetooth][WinRT] Implement Obtaining Gatt Descriptors""
> 
> This reverts commit be2632acba18473ed38a6d093e0f654aadcc0bea.
> 
> Reason for revert: Broke device_unittests on Win10 Tests x64 (dbg) crbug.com/870208
> 
> Original change's description:
> > Reland "[Bluetooth][WinRT] Implement Obtaining Gatt Descriptors"
> > 
> > This reverts commit 67ca5a07611f7b375f58f822364ce294a2d8b5fc.
> > 
> > Reason for revert: https://crrev.com/c/1159374 just landed, fixing the assertion error. Thus relanding the initial change.
> > 
> > Original change's description:
> > > Revert "[Bluetooth][WinRT] Implement Obtaining Gatt Descriptors"
> > > 
> > > This reverts commit 20f64257cc9c09b466c4ae3944dbc165f83a9ae8.
> > > 
> > > Reason for revert: Suspected of breaking device_unittests on Win10 Tests x64 (dbg)
> > > 
> > > Original change's description:
> > > > [Bluetooth][WinRT] Implement Obtaining Gatt Descriptors
> > > > 
> > > > This change implements obtainining Remote Gatt Descriptors for WinRT by
> > > > hooking up the appropriate logic into GattDiscovererWinrt. Furthermore,
> > > > appropriate tests are enabled.
> > > > 
> > > > Bug: 821766
> > > > Change-Id: I20475478367c2ab6b18940b4271de70ec138f676
> > > > Reviewed-on: https://chromium-review.googlesource.com/1156392
> > > > Commit-Queue: Jan Wilken Dörrie <jdoerrie@chromium.org>
> > > > Reviewed-by: Giovanni Ortuño Urquidi <ortuno@chromium.org>
> > > > Reviewed-by: Reilly Grant <reillyg@chromium.org>
> > > > Cr-Commit-Position: refs/heads/master@{#579830}
> > > 
> > > TBR=reillyg@chromium.org,ortuno@chromium.org,jdoerrie@chromium.org
> > > 
> > > Change-Id: If5128ebf0c9dd1f585bd98b9729a57340f4493a0
> > > No-Presubmit: true
> > > No-Tree-Checks: true
> > > No-Try: true
> > > Bug: 821766, 870208
> > > Reviewed-on: https://chromium-review.googlesource.com/1159943
> > > Reviewed-by: Christos Froussios <cfroussios@chromium.org>
> > > Commit-Queue: Christos Froussios <cfroussios@chromium.org>
> > > Cr-Commit-Position: refs/heads/master@{#580106}
> > 
> > TBR=reillyg@chromium.org,ortuno@chromium.org,cfroussios@chromium.org,jdoerrie@chromium.org
> > 
> > Change-Id: I8a4e456fe6d3b63c9d9b02c15ecdd35ac61a7fa7
> > No-Presubmit: true
> > No-Tree-Checks: true
> > No-Try: true
> > Bug: 821766, 870208
> > Reviewed-on: https://chromium-review.googlesource.com/1160901
> > Reviewed-by: Jan Wilken Dörrie <jdoerrie@chromium.org>
> > Commit-Queue: Jan Wilken Dörrie <jdoerrie@chromium.org>
> > Cr-Commit-Position: refs/heads/master@{#580200}
> 
> TBR=reillyg@chromium.org,ortuno@chromium.org,cfroussios@chromium.org,jdoerrie@chromium.org
> 
> Change-Id: I9bd3f94b1be3b58b7975e1e57dff09cd7a9c2910
> No-Presubmit: true
> No-Tree-Checks: true
> No-Try: true
> Bug: 821766, 870208
> Reviewed-on: https://chromium-review.googlesource.com/1161682
> Reviewed-by: Kunihiko Sakamoto <ksakamoto@chromium.org>
> Commit-Queue: Kunihiko Sakamoto <ksakamoto@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#580442}

TBR=reillyg@chromium.org,ksakamoto@chromium.org,ortuno@chromium.org,cfroussios@chromium.org,jdoerrie@chromium.org

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug: 821766, 870208
Change-Id: I29824289cbd23722a5e0397f07f40b62769549d4
Reviewed-on: https://chromium-review.googlesource.com/1163382
Reviewed-by: Jan Wilken Dörrie <jdoerrie@chromium.org>
Commit-Queue: Jan Wilken Dörrie <jdoerrie@chromium.org>
Cr-Commit-Position: refs/heads/master@{#580828}

• device/bluetooth/bluetooth_gatt_discoverer_winrt.cc[diff]
• device/bluetooth/bluetooth_gatt_discoverer_winrt.h[diff]
• device/bluetooth/bluetooth_remote_gatt_characteristic.h[diff]
• device/bluetooth/bluetooth_remote_gatt_characteristic_unittest.cc[diff]
• device/bluetooth/bluetooth_remote_gatt_characteristic_winrt.cc[diff]
• device/bluetooth/bluetooth_remote_gatt_characteristic_winrt.h[diff]
• device/bluetooth/bluetooth_remote_gatt_descriptor_unittest.cc[diff]
• device/bluetooth/bluetooth_remote_gatt_descriptor_winrt.cc[diff]
• device/bluetooth/bluetooth_remote_gatt_descriptor_winrt.h[diff]
• device/bluetooth/bluetooth_remote_gatt_service_winrt.cc[diff]
• device/bluetooth/test/bluetooth_test_win.cc[diff]
• device/bluetooth/test/bluetooth_test_win.h[diff]
• device/bluetooth/test/fake_bluetooth_le_device_winrt.cc[diff]
• device/bluetooth/test/fake_bluetooth_le_device_winrt.h[diff]
• device/bluetooth/test/fake_gatt_characteristic_winrt.cc[diff]
• device/bluetooth/test/fake_gatt_characteristic_winrt.h[diff]
• device/bluetooth/test/fake_gatt_descriptor_winrt.cc[diff]
• device/bluetooth/test/fake_gatt_descriptor_winrt.h[diff]
• device/bluetooth/test/fake_gatt_descriptors_result_winrt.cc[diff]
• device/bluetooth/test/fake_gatt_descriptors_result_winrt.h[diff]
• device/bluetooth/test/fake_gatt_device_service_winrt.cc[diff]
• device/bluetooth/test/fake_gatt_device_service_winrt.h[diff]