Enable SkiaCopyOutputScalingPixelTest

The test should work with SkiaRenderer now.

Bug: 1047217
Change-Id: Ib467e836cf7abc3a8d00b606d81ed33470929db2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2050616Reviewed-by: Jonathan Backer <backer@chromium.org>
Commit-Queue: kylechar <kylechar@chromium.org>
Cr-Commit-Position: refs/heads/master@{#740428}

components/viz/service/display/copy_output_scaling_pixeltest.cc

@@ -115,8 +115,6 @@ class CopyOutputScalingPixelTest
       cc::AddRenderPassQuad(root_pass, smaller_passes[i]);
     cc::AddQuad(root_pass, gfx::Rect(viewport_size), root_pass_color);
 
-    renderer()->DecideRenderPassAllocationsForFrame(list);
-
     // Make a copy request and execute it by drawing a frame. A subset of the
     // viewport is requested, to test that scaled offsets are being computed
     // correctly as well.
@@ -167,6 +165,7 @@ class CopyOutputScalingPixelTest
       request->SetScaleRatio(scale_from_, scale_to_);
       list.back()->copy_requests.push_back(std::move(request));
 
+      renderer()->DecideRenderPassAllocationsForFrame(list);
       renderer()->DrawFrame(&list, 1.0f, viewport_size,
                             gfx::DisplayColorSpaces());
       loop.Run();
@@ -300,9 +299,8 @@ TEST_P(GLCopyOutputScalingPixelTest, ScaledCopyOfDrawnFrame) {
 }
 INSTANTIATE_TEST_SUITE_P(All, GLCopyOutputScalingPixelTest, kParameters);
 
-// TODO(crbug.com/939442): Enable this test for SkiaRenderer.
 using SkiaCopyOutputScalingPixelTest = CopyOutputScalingPixelTest<SkiaRenderer>;
-TEST_P(SkiaCopyOutputScalingPixelTest, DISABLED_ScaledCopyOfDrawnFrame) {
+TEST_P(SkiaCopyOutputScalingPixelTest, ScaledCopyOfDrawnFrame) {
   RunTest();
 }
 INSTANTIATE_TEST_SUITE_P(All, SkiaCopyOutputScalingPixelTest, kParameters);