Do not artificially create a frame delay for GIF files
that do not loop and have an inter-frame delay of 0. Move timeout
calculation to FrameBlender and only access raw timeout of
imgFrame from within FrameBlender.
--HG--
extra : rebase_source : 1a568f16a2980d3d14621869c6b536d054088805
This patch was generated by running include-what-you-use on image/src,
and then removing the #include statements suggested by that tool, either
replacing them with forward declarations of the used names in headers,
or dropping the ones that were completely unnecessary, and then adding
new #include statements in other places that were implicitly relying on
some of the removed #include statements.
This patch moves the logic of moving from one frame to another (and tracking
what frame is current, etc) to a separate class, FrameAnimator. Deciding
*whether* to animate, and actually calling that animation code, is left to
RasterImage, but the animation itself is driven by FrameAnimator.
