More removal of SkColorProfileType...

Scrub GMs. Remove the gDefaultProfile thing (it's unused now), along with
the command line flag that was setting it in DM and nanobench.

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2071393002

Committed: https://skia.googlesource.com/skia/+/944876f2745a62a839e49275daf93a0329372e67
Review-Url: https://codereview.chromium.org/2071393002
diff --git a/gm/color4f.cpp b/gm/color4f.cpp
index 33d8377..5a516a5 100644
--- a/gm/color4f.cpp
+++ b/gm/color4f.cpp
@@ -73,10 +73,13 @@
     // even if it holds sRGB values.
     bg.setColor(0xFFFFFFFF);
 
-    SkColorProfileType const profiles[] { kLinear_SkColorProfileType, kSRGB_SkColorProfileType };
-    for (auto profile : profiles) {
+    sk_sp<SkColorSpace> colorSpaces[]{
+        nullptr,
+        SkColorSpace::NewNamed(SkColorSpace::kSRGB_Named)
+    };
+    for (auto colorSpace : colorSpaces) {
         const SkImageInfo info = SkImageInfo::Make(1024, 100, kN32_SkColorType, kPremul_SkAlphaType,
-                                                   profile);
+                                                   colorSpace);
         auto surface(SkSurface::MakeRaster(info));
         surface->getCanvas()->drawPaint(bg);
         draw_into_canvas(surface->getCanvas());