Rescale if scale factor exceeds scalable range by changed contents size

Rescale if scale factor exceeds scalable range by changed contents size

[Title] Rescale if scale factor exceeds scalable range by changed contents size
[Issue#] N_SE-38068
[Problem] Rotate from landscape to portrait on Google's "Feeling Lucky" page,
         empty space is displayed on right side.
[Cause] Contents size is changed smaller lately after updating scale factor
[Solution] If scale factor exceeds scalable range by changed contents size,
        update scale factor with adjusted value.

Change-Id: Ie16865278097878bdd859343bc064ae7ff576c13