Merged TIZEN_FALLBACK_FONTDATA
Merged TIZEN_WEBKIT2_TILED_AC_DONT_ADJUST_COVER_RECT.
Merge pull request #14 from johndoe3/feature_TIZEN_FALLBACK_FONTDATA

Merged TIZEN_FALLBACK_FONTDATA
Merge pull request #15 from johndoe3/TIZEN_WEBKIT2_TILED_AC_DONT_ADJUST_COVER_RECT

Merged TIZEN_WEBKIT2_TILED_AC_DONT_ADJUST_COVER_RECT.
[Rendering] Performance issue at SpeedReading is fixed(http://ie.microsoft.com/testdrive/mobile/Performance/SpeedReading/Default.html).
Fix build break related to TIZEN_FALLBACK_FONTDATA.
[Rendering] Remove cairo_surface_flush which was called for each drawing call on canvas.