Removed makeLinearGamma() from the public API for SkColorSpace

It will now reside in SkColorSpace_Base. Future work for SkColorSpace
will cause this function to not be desirable or sensible to call on
all SkColorSpaces. Call sites were changed to make a kSRGBLinear_Named
instead of kSRGB_Named -> makeLinearGamma() (the majority of cases),
and if that was not possible, SkColorSpace_Base::makeLinearGamma()
was called instead.

TBR=reed@google.com
BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2412613005

Review-Url: https://codereview.chromium.org/2412613005
diff --git a/tools/skiaserve/Request.cpp b/tools/skiaserve/Request.cpp
index ef1f757..d27f2c0 100644
--- a/tools/skiaserve/Request.cpp
+++ b/tools/skiaserve/Request.cpp
@@ -174,10 +174,9 @@
 SkSurface* Request::createCPUSurface() {
     SkIRect bounds = this->getBounds();
     ColorAndProfile cap = ColorModes[fColorMode];
-    auto colorSpace = SkColorSpace::NewNamed(SkColorSpace::kSRGB_Named);
-    if (kRGBA_F16_SkColorType == cap.fColorType) {
-        colorSpace = colorSpace->makeLinearGamma();
-    }
+    auto colorSpace = kRGBA_F16_SkColorType == cap.fColorType
+                    ? SkColorSpace::NewNamed(SkColorSpace::kSRGBLinear_Named)
+                    : SkColorSpace::NewNamed(SkColorSpace::kSRGB_Named);
     SkImageInfo info = SkImageInfo::Make(bounds.width(), bounds.height(), cap.fColorType,
                                          kPremul_SkAlphaType, cap.fSRGB ? colorSpace : nullptr);
     return SkSurface::MakeRaster(info).release();
@@ -187,10 +186,9 @@
     GrContext* context = this->getContext();
     SkIRect bounds = this->getBounds();
     ColorAndProfile cap = ColorModes[fColorMode];
-    auto colorSpace = SkColorSpace::NewNamed(SkColorSpace::kSRGB_Named);
-    if (kRGBA_F16_SkColorType == cap.fColorType) {
-        colorSpace = colorSpace->makeLinearGamma();
-    }
+    auto colorSpace = kRGBA_F16_SkColorType == cap.fColorType
+                    ? SkColorSpace::NewNamed(SkColorSpace::kSRGBLinear_Named)
+                    : SkColorSpace::NewNamed(SkColorSpace::kSRGB_Named);
     SkImageInfo info = SkImageInfo::Make(bounds.width(), bounds.height(), cap.fColorType,
                                          kPremul_SkAlphaType, cap.fSRGB ? colorSpace: nullptr);
     SkSurface* surface = SkSurface::MakeRenderTarget(context, SkBudgeted::kNo, info).release();