Fixed crash with images without specified colorspaces in wide gamut test

lib/ui/painting/image_decoder_impeller.cc

@@ -54,9 +54,12 @@ static constexpr float kSrgbGamutArea = 0.0982f;
 
 // Source:
 // https://source.chromium.org/chromium/_/skia/skia.git/+/393fb1ec80f41d8ad7d104921b6920e69749fda1:src/codec/SkAndroidCodec.cpp;l=67;drc=46572b4d445f41943059d0e377afc6d6748cd5ca;bpv=1;bpt=0
-bool IsWideGamut(const SkColorSpace& color_space) {
+bool IsWideGamut(const SkColorSpace* color_space) {
+  if (!color_space) {
+    return false;
+  }
   skcms_Matrix3x3 xyzd50;
-  color_space.toXYZD50(&xyzd50);
+  color_space->toXYZD50(&xyzd50);
   SkPoint rgb[3];
   LoadGamut(rgb, xyzd50);
   float area = CalculateArea(rgb);
@@ -134,7 +137,7 @@ std::shared_ptr<SkBitmap> ImageDecoderImpeller::DecompressTexture(
 
   const auto base_image_info = descriptor->image_info();
   const bool is_wide_gamut =
-      supports_wide_gamut ? IsWideGamut(*base_image_info.colorSpace()) : false;
+      supports_wide_gamut ? IsWideGamut(base_image_info.colorSpace()) : false;
   SkAlphaType alpha_type =
       ChooseCompatibleAlphaType(base_image_info.alphaType());
   SkImageInfo image_info;

lib/ui/painting/image_decoder_unittests.cc

@@ -290,6 +290,31 @@ float HalfToFloat(uint16_t half) {
 }
 }  // namespace
 
+TEST_F(ImageDecoderFixtureTest, ImpellerNullColorspace) {
+  auto info = SkImageInfo::Make(10, 10, SkColorType::kRGBA_8888_SkColorType,
+                                SkAlphaType::kPremul_SkAlphaType);
+  SkBitmap bitmap;
+  bitmap.allocPixels(info, 10 * 4);
+  auto data = SkData::MakeWithoutCopy(bitmap.getPixels(), 10 * 10 * 4);
+  auto image = SkImage::MakeFromBitmap(bitmap);
+  ASSERT_TRUE(image != nullptr);
+  ASSERT_EQ(SkISize::Make(10, 10), image->dimensions());
+  ASSERT_EQ(nullptr, image->colorSpace());
+
+  auto descriptor = fml::MakeRefCounted<ImageDescriptor>(
+      std::move(data), image->imageInfo(), 10 * 4);
+
+#if IMPELLER_SUPPORTS_RENDERING
+  std::shared_ptr<SkBitmap> decompressed =
+      ImageDecoderImpeller::DecompressTexture(
+          descriptor.get(), SkISize::Make(100, 100), {100, 100},
+          /*supports_wide_gamut=*/true);
+  ASSERT_TRUE(decompressed);
+  ASSERT_EQ(decompressed->colorType(), kRGBA_8888_SkColorType);
+  ASSERT_EQ(decompressed->colorSpace(), nullptr);
+#endif  // IMPELLER_SUPPORTS_RENDERING
+}
+
 TEST_F(ImageDecoderFixtureTest, ImpellerWideGamutDisplayP3) {
   auto data = OpenFixtureAsSkData("DisplayP3Logo.png");
   auto image = SkImage::MakeFromEncoded(data);