Canvas: Cache images in canvas color space

Ensure that the CanvasImageProvider use its target canvas' color space
as its target color space. This was previously hard-coded to sRGB, which
caused images to be clipped when drawn to wide color gamut canvases.

Bug: 1115286
Change-Id: I42c7cca905b5a9f525854ca2c6e99d0f87016eec
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2551836
Commit-Queue: ccameron <ccameron@chromium.org>
Auto-Submit: ccameron <ccameron@chromium.org>
Reviewed-by: Khushal <khushalsagar@chromium.org>
Cr-Commit-Position: refs/heads/master@{#829676}

third_party/blink/renderer/platform/graphics/canvas_resource_provider.cc

@@ -1134,8 +1134,9 @@ CanvasResourceProvider::GetOrCreateCanvasImageProvider() {
                         : cc::PlaybackImageProvider::RasterMode::kGpu;
     }
     canvas_image_provider_ = std::make_unique<CanvasImageProvider>(
-        ImageDecodeCacheRGBA8(), cache_f16, gfx::ColorSpace::CreateSRGB(),
-        color_params_.GetSkColorType(), raster_mode);
+        ImageDecodeCacheRGBA8(), cache_f16,
+        ColorParams().GetStorageGfxColorSpace(), color_params_.GetSkColorType(),
+        raster_mode);
   }
   return canvas_image_provider_.get();
 }

third_party/blink/web_tests/fast/canvas/color-space/canvas-createImageBitmap-rec2020.html

@@ -46,7 +46,7 @@ var rec2020TransparentBlackImage = [0.16858, 0.16858, 0.16858, 0.50195];
 
 function testPixels(ctx, tests, sourceType)
 {
-    var actual, expected, tolerance = 0.01;
+    var actual, expected, tolerance = 0.02;
     if (sourceType === 'video')
         tolerance = 0.04;
     for (var i = 0; i < tests.length; i++) {