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mukai@chromium.org authored
This CL adds the options of customizing external display's device scale factor from the options page. There are two TODOs though: - the configured device scale factor should be stored - not possible to specify device scale factor and resolution at the same time; from 1600x900, it can't enter to 1920x1080(2x). Instead it enters to 3840x2160, then the user needs to select 2x again. Actually the former would solve the latter; this CL sets the new resolution and the DSF at the same time but resolution change is asynchronous, so changed DSF will be overwritten by the resolution change. I will address these issues in further CL(s). BUG=396704 R=oshima@chromium.org, stevenjb@chromium.org TBR=asvitkine@chromium.org TEST=manually Review URL: https://codereview.chromium.org/417113012 git-svn-id: svn://svn.chromium.org/chrome/trunk/src@287677 0039d316-1c4b-4281-b951-d872f2087c98
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