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.

Review URL: https://codereview.chromium.org/191223007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@269371 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 3 insertions, 0 deletions

diff --git a/ash/DEPS b/ash/DEPS
index 5f55d5c..86c5214 100644
--- a/ash/DEPS
+++ b/ash/DEPS
@@ -21,4 +21,7 @@ specific_include_rules = {
   "root_window_controller\.*": [
     "+ash/host"
   ],
+  "touch_transformer_controller\.*": [
+    "+ash/host"
+  ],
 }