Auto-compare GrProcessors' texture accesses in isEqual().

R=joshualitt@google.com

Review URL: https://codereview.chromium.org/654313002
Properly parse compiler errors for fiddles and mark them in the editor.

You can also click on the errors in the parsed output to jump directly to the offending location in the editor.

BUG=skia:
NOTRY=true

Review URL: https://codereview.chromium.org/660573003
Pull nanomsg from our mirror instead of from github.

https://skia.googlesource.com/third_party/nanomsg/

BUG=skia:3027

Review URL: https://codereview.chromium.org/657113004
Tweak out SkTileGrid::insert() loop.

BUG=skia:

Review URL: https://codereview.chromium.org/658913002
Const-correctness in PDF drawText() call

If SkPDFDevice::drawText is called with glyph encoding and a font with
cubic outlines (CFF or Type1) and a glyph code > 255 then it was
mutating the in(const) glyph codes in place.  Instead, a copy is made.

BUG=skia:3019

Review URL: https://codereview.chromium.org/656143002
render_pdfs cull rect output formated better

Review URL: https://codereview.chromium.org/657353004