HDR: Do nonlinear blending in the compositor

mash/test/mash_test_suite.cc

Index: mash/test/mash_test_suite.cc
diff --git a/mash/test/mash_test_suite.cc b/mash/test/mash_test_suite.cc
index 306ec66ac8b793c3485c667ab9f4893621addf3f..df5f214e0a840d747535867842c8eaf0e556ae08 100644
--- a/mash/test/mash_test_suite.cc
+++ b/mash/test/mash_test_suite.cc
@@ -68,8 +68,11 @@ class TestContextFactory : public ui::ContextFactory,
   void SetDisplayVisible(ui::Compositor* compositor, bool visible) override {}
   void ResizeDisplay(ui::Compositor* compositor,
                      const gfx::Size& size) override {}
-  void SetDisplayColorSpace(ui::Compositor* compositor,
-                            const gfx::ColorSpace& color_space) override {}
+  void SetDisplayColorSpace(
+      ui::Compositor* compositor,
+      const gfx::ColorSpace& blending_color_space,
+      const gfx::ColorSpace& output_color_space) override {}
+
   void SetAuthoritativeVSyncInterval(ui::Compositor* compositor,
                                      base::TimeDelta interval) override {}
   void SetDisplayVSyncParameters(ui::Compositor* compositor,