Add a test for the IsColorSpaceSupportedByPCVR bug

Add a test that reproduces the IsColorSpaceSupportedByPCVR() bug fixed
in https://crrev.com/c/2343535.

Test: blink_platform_unittests --gtest_filter=*AVIF*
Bug: 1108626
Change-Id: I1d1d7e887116240feb9a8b9e8df615d6e78d03d3
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2343506
Commit-Queue: Wan-Teh Chang <wtc@google.com>
Commit-Queue: Peter Kasting <pkasting@chromium.org>
Reviewed-by: Peter Kasting <pkasting@chromium.org>
Cr-Commit-Position: refs/heads/master@{#796194}

third_party/blink/renderer/platform/image-decoders/avif/avif_image_decoder_test.cc

@@ -157,6 +157,18 @@ StaticColorCheckParam kTestParams[] = {
          {gfx::Point(1, 1), SkColorSetARGB(255, 255, 0, 0)},
          {gfx::Point(2, 2), SkColorSetARGB(255, 255, 0, 0)},
      }},
+    {"/images/resources/avif/silver-full-range-srgb-420-8bpc.avif",
+     8,
+     ColorType::kRgb,
+     ImageDecoder::kLosslessFormat,
+     ImageDecoder::kAlphaNotPremultiplied,
+     ColorBehavior::Tag(),
+     1,
+     {
+         {gfx::Point(0, 0), SkColorSetARGB(255, 192, 192, 192)},
+         {gfx::Point(1, 1), SkColorSetARGB(255, 192, 192, 192)},
+         {gfx::Point(2, 2), SkColorSetARGB(255, 192, 192, 192)},
+     }},
     {"/images/resources/avif/alpha-mask-limited-range-8bpc.avif",
      8,
      ColorType::kMono,

third_party/blink/web_tests/images/resources/avif/README.md

@@ -60,5 +60,12 @@ avifenc -r f -d 10 -y 444 -s 0 --nclx 9/18/9 red.png red-full-range-bt2020-pq-44
 avifenc -r f -d 10 -y 444 -s 0 --nclx 9/18/9 red.png red-full-range-bt2020-pq-444-12bpc.avif
 ```
 
+### silver-full-range-srgb-420-8bpc.avif
+This is generated from silver.png (3x3 rgb(192, 192, 192)) with the appropriate
+avifenc command line:
+
+```
+avifenc -r f -d  8 -y 420 -s 0 --nclx 1/13/1 silver.png silver-full-range-srgb-420-8bpc.avif
+```
 
 ### TODO(crbug.com/960620): Figure out how the rest of files were generated.