Scale TouchEvent's radius when touchscreen is in mirror mode

Scale TouchEvent's radius when touchscreen is in mirror mode

TouchEvent's radius on Pixel is reported in the touchscreen's
native resolution. When Pixel is connected to an external screen
and running in mirror mode, the radius value is too large for
the external screen's low display resolution. The radius value
needs to be scaled properly in this case.

BUG=229932
TEST=Switching to mirror mode when connecting Pixel to a low
resolution external display, following the test in the issue
and make sure the radius has a sensible value.

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=195075

[oshima, 2013-04-18 08:38:12]

https://codereview.chromium.org/14279002/diff/2001/chromeos/display/output_co...
File chromeos/display/output_configurator.cc (right):

https://codereview.chromium.org/14279002/diff/2001/chromeos/display/output_co...
chromeos/display/output_configurator.cc:569: float area_ratio = 1.0;
1.0f;

https://codereview.chromium.org/14279002/diff/2001/chromeos/display/output_co...
File chromeos/display/output_configurator.h (right):

https://codereview.chromium.org/14279002/diff/2001/chromeos/display/output_co...
chromeos/display/output_configurator.h:287: std::map<int, float>*
GetMirroredDisplayAreaRatioMap() {
can this be

const std::map<int, float>& 

?

[Yufeng Shen (Slow to review), 2013-04-18 16:22:56]

https://codereview.chromium.org/14279002/diff/2001/chromeos/display/output_co...
File chromeos/display/output_configurator.cc (right):

https://codereview.chromium.org/14279002/diff/2001/chromeos/display/output_co...
chromeos/display/output_configurator.cc:569: float area_ratio = 1.0;
On 2013/04/18 08:38:12, oshima wrote:
> 1.0f;

Done.

https://codereview.chromium.org/14279002/diff/2001/chromeos/display/output_co...
File chromeos/display/output_configurator.h (right):

https://codereview.chromium.org/14279002/diff/2001/chromeos/display/output_co...
chromeos/display/output_configurator.h:287: std::map<int, float>*
GetMirroredDisplayAreaRatioMap() {
On 2013/04/18 08:38:12, oshima wrote:
> can this be
> 
> const std::map<int, float>& 
> 
> ?

Done.

[oshima, 2013-04-18 17:51:36]

lgtm

https://codereview.chromium.org/14279002/diff/8001/ash/display/event_transfor...
File ash/display/event_transformation_handler.cc (right):

https://codereview.chromium.org/14279002/diff/8001/ash/display/event_transfor...
ash/display/event_transformation_handler.cc:77: // area ratio of that
touchscreen to scale the event's radius.
can you file a bug and add reference here so that we don't forget?

[Yufeng Shen (Slow to review), 2013-04-18 18:05:55]

cc derat@ for OWNERS on ash/shell.cc

The change correctly remove event_transformation_handler from pre-target
handlers.

https://codereview.chromium.org/14279002/diff/8001/ash/display/event_transfor...
File ash/display/event_transformation_handler.cc (right):

https://codereview.chromium.org/14279002/diff/8001/ash/display/event_transfor...
ash/display/event_transformation_handler.cc:77: // area ratio of that
touchscreen to scale the event's radius.
On 2013/04/18 17:51:36, oshima wrote:
> can you file a bug and add reference here so that we don't forget? 

Done.

[Daniel Erat, 2013-04-18 19:14:07]

LGTM for ash/shell.cc

[commit-bot: I haz the power, 2013-04-18 19:19:25]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/miletus@chromium.org/14279002/16001

[commit-bot: I haz the power, 2013-04-18 20:21:35]

Sorry for I got bad news for ya.
Compile failed with a clobber build on win7_aura.
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=win7_aura&...
Your code is likely broken or HEAD is junk. Please ensure your
code is not broken then alert the build sheriffs.
Look at the try server FAQ for more details.

[commit-bot: I haz the power, 2013-04-18 20:46:10]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/miletus@chromium.org/14279002/3007

[commit-bot: I haz the power, 2013-04-19 03:39:38]

Change committed as 195075