Fitting by contents' width only
Fitting by contents' width only

[Title] Fitting by contents' width only
[Issue#] WGL-269
[Problem] Horizontal scroll on landscape contents
[Cause] Minimum scale factor is calculated by both horizontal and vertical
        contents' size
[Solution] Calculate minimum scale factor with horizontal contents' size only

Change-Id: Iffc1901445f49469a9478fb7b35ae12aab6202d1

youfoh/webkit-efl,youfoh/webkit-efl,youfoh/webkit-efl,youfoh/webkit-efl,youfoh/webkit-efl,youfoh/webkit-efl,youfoh/webkit-efl,youfoh/webkit-efl,youfoh/webkit-efl,youfoh/webkit-efl,youfoh/webkit-efl