[Autofill] Ignore device scale factor when computing the Autofill popup position.

[Autofill] Ignore device scale factor when computing the Autofill popup position.

BUG=246468
TEST=The Autofill popup should be positioned correctly in the following setup:
     (a) Get a Mac OS X setup where one screen is a non-Retina display,
         and the other is.
     (b) In System Preferences ~> Displays ~> Arrangement, position the
         non-retina display above the retina display.
     (c) Open a browser window on the retina display, and bring up an
         Autofill popup in this window.

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=208872

[Ilya Sherman, 2013-06-26 00:18:15]

I've manually verified that this appears to work correctly on Mac OS X 10.8.4. 
Chris, did you originally add this scaling because you observed that it was
needed on a different platform, or was this just a guess at what should work for
HiDPI systems?

[Scott Hess - ex-Googler, 2013-06-26 00:36:41]

LGTM for OSX, I think these days this kind of thing shouldn't be necessary,
unless coordinates need to be round-tripped from the web side.

But does ChromeOS differ in this area?

[Ilya Sherman, 2013-06-26 00:38:42]

On 2013/06/26 00:36:41, shess wrote:
> LGTM for OSX, I think these days this kind of thing shouldn't be necessary,
> unless coordinates need to be round-tripped from the web side.
> 
> But does ChromeOS differ in this area?

Yeah, I'm not sure... I don't know how to test this on ChromeOS without just
landing the CL and seeing whether things break.  It would be pretty lame,
though, if the two platforms disagreed on when the device_scale_factor should be
applied :/

[csharp, 2013-06-26 12:54:19]

On 2013/06/26 00:18:15, Ilya Sherman wrote:
> I've manually verified that this appears to work correctly on Mac OS X 10.8.4.

> Chris, did you originally add this scaling because you observed that it was
> needed on a different platform, or was this just a guess at what should work
for
> HiDPI systems?

Yup, this was a guess for HiDPI. (I this patch locally on my Linux machine and
Autofill still works as intended)

[commit-bot: I haz the power, 2013-06-26 20:54:37]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/isherman@chromium.org/17743005/1

[commit-bot: I haz the power, 2013-06-26 21:14:19]

Sorry for I got bad news for ya.
Compile failed with a clobber build on ios_dbg_simulator.
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=ios_dbg_si...
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, 2013-06-26 21:44:17]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/isherman@chromium.org/17743005/1

[commit-bot: I haz the power, 2013-06-27 01:04:45]

Sorry for I got bad news for ya.
Compile failed with a clobber build on win_x64_rel.
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=win_x64_re...
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, 2013-06-27 01:09:09]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/isherman@chromium.org/17743005/1

[commit-bot: I haz the power, 2013-06-27 09:19:24]

Change committed as 208872