Fix CTM application in SkResizeImagefilter; implement bounds traversals.

SkResizeImageFilter resizes all the pixels from its input (subject to
the input's crop rect), but the offset to be applied was incorrect.
It should take the CTM into account, so that the origin of the resize is
the world space origin, unaffected by whatever clipping is applied.

New GM imageresizetiled exercises the behaviour under
impl-side-painting-like conditions, and existing GMs now have resize
cases added.

R=reed@google.com, robertphillips@google.com

Review URL: https://codereview.chromium.org/168283006

git-svn-id: http://skia.googlecode.com/svn/trunk@13506 2bbb7eff-a529-9590-31e7-b0007b416f81
7 files changed