Use SkRuntimeColorFilterFactory to test color transform shader compilation

Previously this was tested using SkSLCompiler. However, that type should
remain private to Skia. SkRuntimeColorFilterFactory is quasi-public.
("Public" to Chrome but eventually to all).

Change-Id: I9b523001c7bfce9660f86e0430e164b883e07b04
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1958785Reviewed-by: Jonathan Backer <backer@chromium.org>
Reviewed-by: Sadrul Chowdhury <sadrul@chromium.org>
Commit-Queue: Sadrul Chowdhury <sadrul@chromium.org>
Cr-Commit-Position: refs/heads/master@{#723523}

ui/gfx/color_transform_unittest.cc

@@ -7,7 +7,7 @@
 
 #include "base/logging.h"
 #include "testing/gtest/include/gtest/gtest.h"
-#include "third_party/skia/src/sksl/SkSLCompiler.h"
+#include "third_party/skia/src/core/SkColorFilterPriv.h"
 #include "ui/gfx/color_space.h"
 #include "ui/gfx/color_transform.h"
 #include "ui/gfx/icc_profile.h"
@@ -518,13 +518,9 @@ TEST(SimpleColorSpace, CanParseSkShaderSource) {
 
       std::string source = "void main(inout half4 color) {" +
                            transform->GetSkShaderSource() + "}";
-      SkSL::Program::Settings settings;
-      SkSL::Compiler compiler;
-      auto program = compiler.convertProgram(
-          SkSL::Program::kPipelineStage_Kind,
-          SkSL::String(source.c_str(), source.length()), settings);
-      EXPECT_NE(nullptr, program.get());
-      EXPECT_EQ(0, compiler.errorCount()) << compiler.errorText();
+      SkRuntimeColorFilterFactory factory(
+          SkString(source.c_str(), source.length()), nullptr);
+      EXPECT_TRUE(factory.testCompile());
     }
   }
 }