Merge 270252 "Re-land "Move touch CTM from X into Chrome""

Merge 270252 "Re-land "Move touch CTM from X into Chrome""

> Re-land "Move touch CTM from X into Chrome"
> 
> Currently we compute the touch CTM in OutputConfigurator
> and push that into X. This CL makes computing the touch CTM
> in DisplayController, and pushing it
> into WindowTreeHostX11. This moves the functionality of
> touch CTM from X into Chrome.
> 
> Basically, when there is output configuration change, we
> compute the TouchCTM for each touch device, and push the
> TouchCTM into the WindowTreeHostX11 that is associated
> with the touchscreen. Then when X events reaching root
> window, we use the CTM to map the events coordinate in
> framebuffer space into the root window's coordinate space.
> 
> 
> BUG=351019, chrome-os-partner:25788
> TEST=tested on Pixel/Clapper with external touch/non-touch displays
> on both extended/mirror mode. Touch events are correctly mapped to
> chrome window or discarded if it is from blank region from letterboxing/pillarboxing mirror mode.
> 
> Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=269371
> 
> TBR=sadrul@chromium.org
> 
> Review URL: https://codereview.chromium.org/280833002

TBR=miletus@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=271939

[Yufeng Shen (Slow to review), 2014-05-21 19:20:14]

Committed patchset #1 manually as r271939.