Does that mean that wide-gamut images currently don't work?

Oh -- we always decode images into their own color space now -- the decision of which space to raster into is done in cc::, not blink::.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/598ce823a09c136e054cc288c0f9146e61b47c3a

commit 598ce823a09c136e054cc288c0f9146e61b47c3a
Author: Christopher Cameron <ccameron@chromium.org>
Date: Wed Aug 30 19:05:37 2017

color: Move ICC profile histograms from blink to gfx

Histogram all new ICC profiles that are created from raw data. Do this
only when creating the profile from data, not
 - when receiving a profile via IPC
 - when creating a profile from data that is already cached

In histogramming the results of parsing and ICC profile, disambiguate
several separate states that were previously merged.

The old histogramming code would attempt to numerically approximate
all channels separately, but not actually use the result. For the
moment, remove this. Only approximate the combined channels.

R=hubbe
TBR=chrishtr (third_party/WebKit/...), holte (tools/metrics/...)

Bug:  754701 
Change-Id: Iee03959a8a6f96610cc3977311fcd61da5547ac7
Reviewed-on: https://chromium-review.googlesource.com/612252
Commit-Queue: ccameron chromium <ccameron@chromium.org>
Reviewed-by: Fredrik Hubinette <hubbe@chromium.org>
Cr-Commit-Position: refs/heads/master@{#498558}
[modify] https://crrev.com/598ce823a09c136e054cc288c0f9146e61b47c3a/third_party/WebKit/Source/platform/graphics/ColorBehavior.cpp
[modify] https://crrev.com/598ce823a09c136e054cc288c0f9146e61b47c3a/tools/metrics/histograms/enums.xml
[modify] https://crrev.com/598ce823a09c136e054cc288c0f9146e61b47c3a/ui/display/mac/screen_mac.mm
[modify] https://crrev.com/598ce823a09c136e054cc288c0f9146e61b47c3a/ui/display/win/color_profile_reader.cc
[modify] https://crrev.com/598ce823a09c136e054cc288c0f9146e61b47c3a/ui/gfx/icc_profile.cc
[modify] https://crrev.com/598ce823a09c136e054cc288c0f9146e61b47c3a/ui/gfx/icc_profile.h
[modify] https://crrev.com/598ce823a09c136e054cc288c0f9146e61b47c3a/ui/views/widget/desktop_aura/desktop_screen_x11.cc

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/c46032ebc79565ff52ddd152018fdfefb45f4e06

commit c46032ebc79565ff52ddd152018fdfefb45f4e06
Author: Reilly Grant <reillyg@chromium.org>
Date: Wed Aug 30 22:53:52 2017

Revert "color: Move ICC profile histograms from blink to gfx"

This reverts commit 598ce823a09c136e054cc288c0f9146e61b47c3a.

Reason for revert: Breaks content_shell.  https://crbug.com/760767 

Original change's description:
> color: Move ICC profile histograms from blink to gfx
> 
> Histogram all new ICC profiles that are created from raw data. Do this
> only when creating the profile from data, not
>  - when receiving a profile via IPC
>  - when creating a profile from data that is already cached
> 
> In histogramming the results of parsing and ICC profile, disambiguate
> several separate states that were previously merged.
> 
> The old histogramming code would attempt to numerically approximate
> all channels separately, but not actually use the result. For the
> moment, remove this. Only approximate the combined channels.
> 
> R=​hubbe
> TBR=chrishtr (third_party/WebKit/...), holte (tools/metrics/...)
> 
> Bug:  754701 
> Change-Id: Iee03959a8a6f96610cc3977311fcd61da5547ac7
> Reviewed-on: https://chromium-review.googlesource.com/612252
> Commit-Queue: ccameron chromium <ccameron@chromium.org>
> Reviewed-by: Fredrik Hubinette <hubbe@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#498558}

TBR=ccameron@chromium.org,hubbe@chromium.org

Change-Id: I87ef06d8694d6ec6b8b2bf6123d320d4fc0b5e7f
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug:  754701 
Reviewed-on: https://chromium-review.googlesource.com/644153
Reviewed-by: Reilly Grant <reillyg@chromium.org>
Commit-Queue: Reilly Grant <reillyg@chromium.org>
Cr-Commit-Position: refs/heads/master@{#498654}
[modify] https://crrev.com/c46032ebc79565ff52ddd152018fdfefb45f4e06/third_party/WebKit/Source/platform/graphics/ColorBehavior.cpp
[modify] https://crrev.com/c46032ebc79565ff52ddd152018fdfefb45f4e06/tools/metrics/histograms/enums.xml
[modify] https://crrev.com/c46032ebc79565ff52ddd152018fdfefb45f4e06/ui/display/mac/screen_mac.mm
[modify] https://crrev.com/c46032ebc79565ff52ddd152018fdfefb45f4e06/ui/display/win/color_profile_reader.cc
[modify] https://crrev.com/c46032ebc79565ff52ddd152018fdfefb45f4e06/ui/gfx/icc_profile.cc
[modify] https://crrev.com/c46032ebc79565ff52ddd152018fdfefb45f4e06/ui/gfx/icc_profile.h
[modify] https://crrev.com/c46032ebc79565ff52ddd152018fdfefb45f4e06/ui/views/widget/desktop_aura/desktop_screen_x11.cc

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/374b6c4ce72e03d2d10eca28496b2f6cad77326d

commit 374b6c4ce72e03d2d10eca28496b2f6cad77326d
Author: Christopher Cameron <ccameron@chromium.org>
Date: Thu Aug 31 22:21:23 2017

Reland "color: Move ICC profile histograms from blink to gfx"

This is a reland of 598ce823a09c136e054cc288c0f9146e61b47c3a
Original change's description:
> color: Move ICC profile histograms from blink to gfx
> 
> Histogram all new ICC profiles that are created from raw data. Do this
> only when creating the profile from data, not
>  - when receiving a profile via IPC
>  - when creating a profile from data that is already cached
> 
> In histogramming the results of parsing and ICC profile, disambiguate
> several separate states that were previously merged.
> 
> The old histogramming code would attempt to numerically approximate
> all channels separately, but not actually use the result. For the
> moment, remove this. Only approximate the combined channels.
> 
> R=hubbe
> TBR=chrishtr (third_party/WebKit/...), holte (tools/metrics/...)
> 
> Bug:  754701 
> Change-Id: Iee03959a8a6f96610cc3977311fcd61da5547ac7
> Reviewed-on: https://chromium-review.googlesource.com/612252
> Commit-Queue: ccameron chromium <ccameron@chromium.org>
> Reviewed-by: Fredrik Hubinette <hubbe@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#498558}

R=hubbe
TBR=chrishtr (third_party/WebKit/...), holte (tools/metrics/...)

Bug:  754701 
Change-Id: If883ef371aace58318eaf52275ca692b61e67934
Reviewed-on: https://chromium-review.googlesource.com/646580
Commit-Queue: ccameron chromium <ccameron@chromium.org>
Reviewed-by: ccameron chromium <ccameron@chromium.org>
Cr-Commit-Position: refs/heads/master@{#499043}
[modify] https://crrev.com/374b6c4ce72e03d2d10eca28496b2f6cad77326d/third_party/WebKit/Source/platform/graphics/ColorBehavior.cpp
[modify] https://crrev.com/374b6c4ce72e03d2d10eca28496b2f6cad77326d/tools/metrics/histograms/enums.xml
[modify] https://crrev.com/374b6c4ce72e03d2d10eca28496b2f6cad77326d/ui/display/mac/screen_mac.mm
[modify] https://crrev.com/374b6c4ce72e03d2d10eca28496b2f6cad77326d/ui/display/win/color_profile_reader.cc
[modify] https://crrev.com/374b6c4ce72e03d2d10eca28496b2f6cad77326d/ui/gfx/icc_profile.cc
[modify] https://crrev.com/374b6c4ce72e03d2d10eca28496b2f6cad77326d/ui/gfx/icc_profile.h
[modify] https://crrev.com/374b6c4ce72e03d2d10eca28496b2f6cad77326d/ui/views/widget/desktop_aura/desktop_screen_x11.cc