No pointerType for mouse/stylus except when stylus taps, which creates a pointerType=mouse event.

I could make touch work today on Windows. Navid, do you recall it working?

I do recall it working for W3C tests but it wasn't working with that drawing demo we found. Could be the coordinates problem which was causing that drawing demo to draw outside of the canvas or something like that.

Looks like low-level events in Windows never have PointerDetails.pointer_type set to POINTER_TYPE_UNKNOWN, so there's a chance we are messing up the type at a higher level.

https://code.google.com/p/chromium/codesearch#chromium/src/ui/events/win/events_win.cc&l=293

This is also a demo that uses the pointerTypes:

https://david.blob.core.windows.net/html5/PECR/touchsample4.htm

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/8a78e7138f7fce8ce8bfe75803bbf8c33877da9a

commit 8a78e7138f7fce8ce8bfe75803bbf8c33877da9a
Author: lanwei <lanwei@chromium.org>
Date: Wed May 25 22:04:42 2016

Set PointerType of pointer event on Windows.

Pointer event's PointerType did not set on Windows for mouse type when converting from
ui::MouseEvent to blink::WebMouseEvent.
In WebMouseEventBuilder::Build for Windows, I set the pointer type of WebMouseEvent.

BUG= 605639 

Review-Url: https://codereview.chromium.org/1993853002
Cr-Commit-Position: refs/heads/master@{#395999}

[modify] https://crrev.com/8a78e7138f7fce8ce8bfe75803bbf8c33877da9a/content/browser/renderer_host/input/web_input_event_builders_win.cc
[modify] https://crrev.com/8a78e7138f7fce8ce8bfe75803bbf8c33877da9a/content/browser/renderer_host/input/web_input_event_builders_win.h
[modify] https://crrev.com/8a78e7138f7fce8ce8bfe75803bbf8c33877da9a/content/browser/renderer_host/input/web_input_event_unittest.cc
[modify] https://crrev.com/8a78e7138f7fce8ce8bfe75803bbf8c33877da9a/content/browser/renderer_host/web_input_event_aura.cc
[modify] https://crrev.com/8a78e7138f7fce8ce8bfe75803bbf8c33877da9a/content/browser/renderer_host/web_input_event_aurawin.cc

Your change meets the bar and is auto-approved for M52 (branch: 2743)

Please have a the CL merged by EOD tomorrow (05/27), so it gets tested for dev channel release scheduled on 06/02.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/b8a16ac50c11d9325a4d20dbd617c721d13e180a

commit b8a16ac50c11d9325a4d20dbd617c721d13e180a
Author: lanwei <lanwei@chromium.org>
Date: Fri May 27 16:10:16 2016

Set PointerType of pointer event on Windows.

Pointer event's PointerType did not set on Windows for mouse type when converting from
ui::MouseEvent to blink::WebMouseEvent.
In WebMouseEventBuilder::Build for Windows, I set the pointer type of WebMouseEvent.

BUG= 605639 

Review-Url: https://codereview.chromium.org/1993853002
Cr-Commit-Position: refs/heads/master@{#395999}
(cherry picked from commit 8a78e7138f7fce8ce8bfe75803bbf8c33877da9a)

Review URL: https://codereview.chromium.org/2016383002 .

Cr-Commit-Position: refs/branch-heads/2743@{#102}
Cr-Branched-From: 2b3ae3b8090361f8af5a611712fc1a5ab2de53cb-refs/heads/master@{#394939}

[modify] https://crrev.com/b8a16ac50c11d9325a4d20dbd617c721d13e180a/content/browser/renderer_host/input/web_input_event_builders_win.cc
[modify] https://crrev.com/b8a16ac50c11d9325a4d20dbd617c721d13e180a/content/browser/renderer_host/input/web_input_event_builders_win.h
[modify] https://crrev.com/b8a16ac50c11d9325a4d20dbd617c721d13e180a/content/browser/renderer_host/input/web_input_event_unittest.cc
[modify] https://crrev.com/b8a16ac50c11d9325a4d20dbd617c721d13e180a/content/browser/renderer_host/web_input_event_aura.cc
[modify] https://crrev.com/b8a16ac50c11d9325a4d20dbd617c721d13e180a/content/browser/renderer_host/web_input_event_aurawin.cc