Roll src/third_party/skia/ 211df3806..08c4bdf30 (22 commits).

https://chromium.googlesource.com/skia.git/+log/211df380655d..08c4bdf305b7

$ git log 211df3806..08c4bdf30 --date=short --no-merges --format='%ad %ae %s'
2015-11-22 fmalita Revert of Add stroking support to distance field path renderer (patchset #8 id:160001 of https://codereview.chromium.org/1460873002/ )
2015-11-21 reed Revert[2] of "quick-accept clipRect calls"
2015-11-20 bsalomon Revert of Initial version of external_oes texture support and unit test (patchset #14 id:260001 of https://codereview.chromium.org/1451683002/ )
2015-11-20 bsalomon Initial version of external_oes texture support and unit test
2015-11-20 bsalomon Revert of option to quick-accept clipRect calls (patchset #3 id:40001 of https://codereview.chromium.org/1458913005/ )
2015-11-20 egdaniel Revert of Make specialized SrcOver XPFactory (patchset #3 id:40001 of https://codereview.chromium.org/1455273006/ )
2015-11-20 caryclark fix pathops coincidence fuzz bug
2015-11-20 jvanverth Add stroking support to distance field path renderer
2015-11-20 egdaniel Create GrGLSLVaryingHandler class for program building
2015-11-20 egdaniel Make specialized SrcOver XPFactory
2015-11-20 fmalita Tiny linear gradient GM
2015-11-20 mtklein Fix UB in SkDivBits
2015-11-20 mtklein Add SkNx_cast().
2015-11-20 herb Move glyph choosing to the find and place glyph code.
2015-11-20 fmalita SkFontConfigInterface::createTypeface()
2015-11-20 halcanary Eliminate SkFILE: it always is the same as FILE.
2015-11-20 reed option to quick-accept clipRect calls
2015-11-20 reed enable conservative raster clipping
2015-11-20 herb Initialize memory for BitMask and Clip test.
2015-11-20 joshualitt Factor out GrAtlasTextBatch fromt GrAtlasTextContext
2015-11-20 jvanverth Pack and align SkStrokeRec to 4-byte boundary.
2015-11-20 kkinnunen Generate list of GPU contexts outside SurfaceTest tests

CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel
TBR=jvanverth@google.com

Review URL: https://codereview.chromium.org/1468843002

Cr-Commit-Position: refs/heads/master@{#361045}

DEPS

@@ -39,7 +39,7 @@ vars = {
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling Skia
   # and whatever else without interference from each other.
-  'skia_revision': '211df380655d3fd0c76b9b7f8be399040ca0b7a5',
+  'skia_revision': '08c4bdf305b75815cff209edcaa12b9e26690186',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling V8
   # and whatever else without interference from each other.