Android N7 zoomed in on resolutions < VGA - workaround

Renamed DeviceImageFormatHack to BuggyDeviceHack and extended
to hold a list of (1) devices listed by Model+Device for which minimum
width and height are given.

That is used to check for model etc and if necessary to overwrite
capture sizes smaller than that.

Test it via f.i. [1] and making sure 320x240 resolution is not
excessively zoomed in w.r.t. 640x480 or higher.

[1] http://webrtc.googlecode.com/svn/trunk/samples/js/demos/html/constraints-and-stats.html

BUG=305294

Review URL: https://codereview.chromium.org/138063004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@246006 0039d316-1c4b-4281-b951-d872f2087c98
Memory sheriffing:
 -- exclude NTPUserDataLoggerTest.TestLogging under all tools (issue 336349)
 -- exclude AutoclickTest.UserInputCancelsAutoclick under Memcheck (issue 336351)

BUG=336349,336351
TBR=eugenis@chromium.org

Review URL: https://codereview.chromium.org/143883004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@246007 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 246007