The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/514383a2188ae3b4f2fdc7f466abfa3ebb9880af

commit 514383a2188ae3b4f2fdc7f466abfa3ebb9880af
Author: Julie Jeongeun Kim <jkim@igalia.com>
Date: Fri Aug 17 13:45:32 2018

[ozone/wayland] Add a helper function to WaylandDataDevice to read the data from FD

It moves the code to read the data from FD to 'ReadDataFromFD' in
WaylandDataDevice to reuse it for drag-and-drop, as WaylandDataDevice
is the class to handle not only copy-and-paste but drag-and-drop and
drag-and-drop needs to read the data from FD as well.

It doesn't bring behavioral changes.

Bug: 578890, 875164
Change-Id: I460ab9df2b4d32bbdb0e71c753cb19c572df12ab
Reviewed-on: https://chromium-review.googlesource.com/1179505
Reviewed-by: Maksim Sisov <msisov@igalia.com>
Reviewed-by: Antonio Gomes <tonikitoo@igalia.com>
Commit-Queue: Julie Jeongeun Kim <jkim@igalia.com>
Cr-Commit-Position: refs/heads/master@{#584047}
[modify] https://crrev.com/514383a2188ae3b4f2fdc7f466abfa3ebb9880af/ui/ozone/platform/wayland/wayland_data_device.cc
[modify] https://crrev.com/514383a2188ae3b4f2fdc7f466abfa3ebb9880af/ui/ozone/platform/wayland/wayland_data_device.h

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/2f1d779496e6d7caefd1780f4946aced1e22401c

commit 2f1d779496e6d7caefd1780f4946aced1e22401c
Author: Julie Jeongeun Kim <jkim@igalia.com>
Date: Sun Aug 19 02:46:10 2018

[ozone/wayland] Add wayland_util.cc/h to create utiliy APIs

It introduces wayland_util.cc/h and moves the code to create shared
memory buffer and draw bitmap on it from WaylandCursor, as it could
be used generally rather than specific to cursor area.
On upcoming patch for drag and drop on Wayland, it's also required
to pass the drag icon surface to Wayland.

It doesn't bring behavioral changes.

Bug: 578890, 875164
Change-Id: I0cd4603c2abacaa899a9fcf19d97186d6f493146
Reviewed-on: https://chromium-review.googlesource.com/1179487
Commit-Queue: Julie Jeongeun Kim <jkim@igalia.com>
Reviewed-by: Antonio Gomes <tonikitoo@igalia.com>
Reviewed-by: Maksim Sisov <msisov@igalia.com>
Cr-Commit-Position: refs/heads/master@{#584328}
[modify] https://crrev.com/2f1d779496e6d7caefd1780f4946aced1e22401c/ui/ozone/platform/wayland/BUILD.gn
[modify] https://crrev.com/2f1d779496e6d7caefd1780f4946aced1e22401c/ui/ozone/platform/wayland/wayland_cursor.cc
[modify] https://crrev.com/2f1d779496e6d7caefd1780f4946aced1e22401c/ui/ozone/platform/wayland/wayland_cursor.h
[add] https://crrev.com/2f1d779496e6d7caefd1780f4946aced1e22401c/ui/ozone/platform/wayland/wayland_util.cc
[add] https://crrev.com/2f1d779496e6d7caefd1780f4946aced1e22401c/ui/ozone/platform/wayland/wayland_util.h

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/e3a08235ae90742349cac20ae2535a079b0c31d5

commit e3a08235ae90742349cac20ae2535a079b0c31d5
Author: Julie Jeongeun Kim <jkim@igalia.com>
Date: Fri Sep 07 00:01:18 2018

[ozone/wayland] Implement 'Drag and Drop' on Wayland

This CL is a part of changes for 'Drag and Drop' on wayland and
extends WaylandDataDevice, WaylandDataSource and WaylandDataOffer.

WaylandDataDevice registers event listeners for 'drag and drop',
has 'StartDrag' API connected with 'wl_data_device_start_drag' and
includes reading the data from Wayland.

WaylandDataSource registers event listeners for 'drag and drop' to
handle at a source side and writes the data to the fd delivered
from Wayland when it gets 'OnSend' event.

WaylandDataOffer gets the operation decided by Wayland and requests
the offered data by Wayland.

FakeServer is also extended to support the various compositor side
functionalities needed so that tests 'drag-and-drop' in
wayland_data_device_unittest.cc run. MockDataDevice, MockDataOffer
and MockDataSource classes are extended, implementing the respective
Wayland compositor hooks to communicate with Wayland clients
(eg Ozone/Wayland).

Flow:
1) Sending dragging
'WaylandDataDevice::StartDrag' triggers the drag action to Wayland,
Wayland requests the data through 'WaylandDataSource::OnSend' and
'WaylandDataSource' listens the status through 'OnCancel' or
'OnDnDDropPerformed'.

2) Getting dragging
'WaylandDataDevice' listens drag-and-drop status such as entered/
moved/dropped/left. When the drop action is performed,
'WaylandDataDevice' reads the data using 'WaylandDataOffer'.

BUG=875164
TEST=ozone_unittests

Change-Id: Ic1ad80fce4ac396385f3ba6780839ef31d717683
Reviewed-on: https://chromium-review.googlesource.com/1176891
Reviewed-by: Robert Kroeger <rjkroege@chromium.org>
Reviewed-by: Sadrul Chowdhury <sadrul@chromium.org>
Reviewed-by: Antonio Gomes <tonikitoo@igalia.com>
Reviewed-by: Maksim Sisov <msisov@igalia.com>
Commit-Queue: Julie Jeongeun Kim <jkim@igalia.com>
Cr-Commit-Position: refs/heads/master@{#589375}
[modify] https://crrev.com/e3a08235ae90742349cac20ae2535a079b0c31d5/ui/ozone/platform/wayland/BUILD.gn
[modify] https://crrev.com/e3a08235ae90742349cac20ae2535a079b0c31d5/ui/ozone/platform/wayland/DEPS
[modify] https://crrev.com/e3a08235ae90742349cac20ae2535a079b0c31d5/ui/ozone/platform/wayland/fake_server.cc
[modify] https://crrev.com/e3a08235ae90742349cac20ae2535a079b0c31d5/ui/ozone/platform/wayland/fake_server.h
[modify] https://crrev.com/e3a08235ae90742349cac20ae2535a079b0c31d5/ui/ozone/platform/wayland/wayland_connection.cc
[modify] https://crrev.com/e3a08235ae90742349cac20ae2535a079b0c31d5/ui/ozone/platform/wayland/wayland_connection.h
[modify] https://crrev.com/e3a08235ae90742349cac20ae2535a079b0c31d5/ui/ozone/platform/wayland/wayland_data_device.cc
[modify] https://crrev.com/e3a08235ae90742349cac20ae2535a079b0c31d5/ui/ozone/platform/wayland/wayland_data_device.h
[modify] https://crrev.com/e3a08235ae90742349cac20ae2535a079b0c31d5/ui/ozone/platform/wayland/wayland_data_device_unittest.cc
[modify] https://crrev.com/e3a08235ae90742349cac20ae2535a079b0c31d5/ui/ozone/platform/wayland/wayland_data_offer.cc
[modify] https://crrev.com/e3a08235ae90742349cac20ae2535a079b0c31d5/ui/ozone/platform/wayland/wayland_data_offer.h
[modify] https://crrev.com/e3a08235ae90742349cac20ae2535a079b0c31d5/ui/ozone/platform/wayland/wayland_data_source.cc
[modify] https://crrev.com/e3a08235ae90742349cac20ae2535a079b0c31d5/ui/ozone/platform/wayland/wayland_data_source.h
[modify] https://crrev.com/e3a08235ae90742349cac20ae2535a079b0c31d5/ui/ozone/platform/wayland/wayland_object.cc
[modify] https://crrev.com/e3a08235ae90742349cac20ae2535a079b0c31d5/ui/ozone/platform/wayland/wayland_window.cc
[modify] https://crrev.com/e3a08235ae90742349cac20ae2535a079b0c31d5/ui/ozone/platform/wayland/wayland_window.h

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/67a7e39e2f2db492fb85f025607465b0b991631f

commit 67a7e39e2f2db492fb85f025607465b0b991631f
Author: Julie Jeongeun Kim <jkim@igalia.com>
Date: Fri Oct 26 07:32:21 2018

[Ozone] Implement starting dragging with ozone

It introduces DesktopDragDropClientOzone class to manage
drag-and-drop. 'DesktopWindowTreeHostPlatform::CreateDragDropClient'
creates DesktopDragDropClientOzone and it's connected to platform
windows and has an internal runloop like other DragDropClients.

It adds WmDragHandler and sets the platform window as a WmDragHandler.
When DesktopWindowTreeHostPlatform starts dragging, it gets
WmDragHandler through the platform window and sends the dragging
request to the platform layer.

It implements 'StartDragAndDrop' of 'DragDropClient' for Ozone
and adds 'OnDragSessionClosed' to DesktopDragDropClientOzone to
finish dragging session.

As Wayland platform window has the drag and drop implementation
at the platform layer already, it extends WaylandWindow interfaces,
StartDrag.

With this change, Ozone/Wayland build can start dragging from an
application to the Chromium browser.

Test=DesktopDragDropClientOzoneTest.StartDrag
BUG=875164

Change-Id: I4ebaedfae5f6affb80b4d6c7c6d8ed3ba86ef4ca
Reviewed-on: https://chromium-review.googlesource.com/c/1218446
Reviewed-by: Sadrul Chowdhury <sadrul@chromium.org>
Commit-Queue: Julie Jeongeun Kim <jkim@igalia.com>
Cr-Commit-Position: refs/heads/master@{#603024}
[modify] https://crrev.com/67a7e39e2f2db492fb85f025607465b0b991631f/ui/compositor/test/test_compositor_host_ozone.cc
[modify] https://crrev.com/67a7e39e2f2db492fb85f025607465b0b991631f/ui/ozone/platform/wayland/wayland_window.cc
[modify] https://crrev.com/67a7e39e2f2db492fb85f025607465b0b991631f/ui/ozone/platform/wayland/wayland_window.h
[modify] https://crrev.com/67a7e39e2f2db492fb85f025607465b0b991631f/ui/platform_window/platform_window_handler/BUILD.gn
[add] https://crrev.com/67a7e39e2f2db492fb85f025607465b0b991631f/ui/platform_window/platform_window_handler/wm_drag_handler.cc
[add] https://crrev.com/67a7e39e2f2db492fb85f025607465b0b991631f/ui/platform_window/platform_window_handler/wm_drag_handler.h
[modify] https://crrev.com/67a7e39e2f2db492fb85f025607465b0b991631f/ui/views/BUILD.gn
[add] https://crrev.com/67a7e39e2f2db492fb85f025607465b0b991631f/ui/views/widget/desktop_aura/desktop_drag_drop_client_ozone.cc
[add] https://crrev.com/67a7e39e2f2db492fb85f025607465b0b991631f/ui/views/widget/desktop_aura/desktop_drag_drop_client_ozone.h
[add] https://crrev.com/67a7e39e2f2db492fb85f025607465b0b991631f/ui/views/widget/desktop_aura/desktop_drag_drop_client_ozone_unittest.cc
[modify] https://crrev.com/67a7e39e2f2db492fb85f025607465b0b991631f/ui/views/widget/desktop_aura/desktop_window_tree_host_platform.cc