Roll src/third_party/skia/ 64e753309..1de415f2c (12 commits).

https://chromium.googlesource.com/skia.git/+log/64e75330916f..1de415f2c33f

$ git log 64e753309..1de415f2c --date=short --no-merges --format='%ad %ae %s'
2016-02-10 kjlubick Revert of Make SkPicture/SkImageGenerator default to SkCodec (patchset #7 id:120001 of https://codereview.chromium.org/1671193002/ )
2016-02-10 scroggo Make SkPicture/SkImageGenerator default to SkCodec
2016-02-10 bsalomon Turn on conservative raster clip for GPU canvases GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1682223002
2016-02-10 egdaniel Finalize gpu shaders in ProgramBuilding.
2016-02-10 joshualitt Fix for mips build
2016-02-10 reed move compose-shader into base-class as factory
2016-02-10 joshualitt cleanup textblob cache sanity check and prevent it from bitrotting
2016-02-10 msarett Clean up comments in SkSwizzler
2016-02-10 mtklein Sk4f: floor() via int32_t roundtrip.
2016-02-10 msarett Enable ImageGenerator tests on direct raster and direct gpu backends
2016-02-10 ethannicholas Moved Canvas->JSON and JSON->Canvas functionality into SkDebugCanvas. SkJSONCanvas and SkJSONRenderer will be deleted once the debug server has been updated. GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1681643002
2016-02-10 caryclark Revert of Moved Canvas->JSON and JSON->Canvas functionality into SkDebugCanvas. (patchset #3 id:40001 of https://codereview.chromium.org/1681643002/ )

CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel;tryserver.chromium.win:win_clang_dbg
TBR=kjlubick@google.com

Review URL: https://codereview.chromium.org/1686553005

Cr-Commit-Position: refs/heads/master@{#374800}

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': '64e75330916f670cf9db9eb7a850afc325b18645',
+  'skia_revision': '1de415f2c33febbac668500afbbb0c9b120c125f',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling V8
   # and whatever else without interference from each other.