commit 75ce605f5fe61e07892ee9686bba8fac6cca2087
author Min Chen <minch@google.com> Fri Feb 08 21:50:24 2019
committer Commit Bot <commit-bot@chromium.org> Fri Feb 08 21:50:24 2019
tree 52cc8076a39f07a1f52a8183ea23a992e08e30ee
parent 21ee08d71d3bf4ad1baefa92390a99baa4e5cded

Add UMA for window drag in tablet mode.

Tablet.AppWindowDrag.CountOfPerUserSession:
The number of the app window drag from top in tablet mode per user
session.

Tablet.AppWindowDrag.InSplitView.CountOfPerUserSession:
The number of the app window drag from top in tablet mode when
splitview is active per user session.

Tablet.TabDrag.CountOfPerUserSession:
The number of the tab drag in tablet mode per user session.

Tablet.TabDrag.InSplitView.CountOfPerUserSession:
The number of the tab drag in tablet mode when splitview is active per
user session.

Tablet.TabDrag.DragType:
The type of the tab drag in tablet mode.

Tablet.WindowDrag.OpenedWindowsNumber:
The number of windows in overview when app window drag happens.

Tablet.AppDrag.EndWindowState:
The end state of app window drag from top, e.g, in overview, splitview
or back to maximized or fullscreen.

Tablet.WindowDrag.DragEndEventType:
Window drag end event, normal end, revert or fling.

Tablet.WindowDrag.OpenedOverview:
Count the times that overview has been opened when drag a window from
top in tablet mode. Used to compare with "Tray_Overview", which count
tapping overview button to open overview.


Bug: 916830
Change-Id: Ida204a02445f8fbef6c0f0c7040117dfa99bde13
Reviewed-on: https://chromium-review.googlesource.com/c/1388556
Reviewed-by: Jesse Doherty <jwd@chromium.org>
Reviewed-by: Xiyuan Xia <xiyuan@chromium.org>
Reviewed-by: Xiaoqian Dai <xdai@chromium.org>
Commit-Queue: Min Chen <minch@chromium.org>
Cr-Commit-Position: refs/heads/master@{#630479}