Revert of skia: Add support for CHROMIUM_image backed textures. (patchset #17 id:340001 of https://codereview.chromium.org/1623653002/ )

Reason for revert:
New unit test is failing on Windows ANGLE bots:
http://build.chromium.org/p/client.skia/builders/Test-Win8-MSVC-ShuttleB-GPU-HD4600-x86_64-Release-ANGLE/builds/1866/steps/dm/logs/stdio

Original issue's description:
> skia: Add support for CHROMIUM_image backed textures.
>
> I created a new abstract base class TextureStorageAllocator that consumers of
> Skia can subclass and pass back to Skia. When a surface is created with a
> pointer to a TextureStorageAllocator, any textures it creates, or that are
> derived from the original surface, will allocate and deallocate storage using
> the methods on TextureStorageAllocator.
>
> BUG=https://code.google.com/p/chromium/issues/detail?id=579664
> GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1623653002
>
> Committed: https://skia.googlesource.com/skia/+/92098e691f10a010e7421125ba4d44c02506bb55
>
> Committed: https://skia.googlesource.com/skia/+/7fec91ce6660190f8d7c5eb6f3061e4550cc672b

TBR=bsalomon@chromium.org,cblume@chromium.org,robertphillips@google.com,egdaniel@google.com,reed@google.com,erikchen@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=https://code.google.com/p/chromium/issues/detail?id=579664

Review URL: https://codereview.chromium.org/1673923003
13 files changed