Remove SK_PREFER_LEGACY_FLOAT_XFERMODES

R=reed@google.com,mtklein@google.com
BUG=490188

Review URL: https://codereview.chromium.org/1143923003

Cr-Commit-Position: refs/heads/master@{#330779}

skia/config/SkUserConfig.h

@@ -277,10 +277,6 @@ SK_API void SkDebugf_FileLine(const char* file, int line, bool fatal,
 #   define SK_LEGACY_STROKE_CURVES
 #endif
 
-#ifndef    SK_PREFER_LEGACY_FLOAT_XFERMODES
-#   define SK_PREFER_LEGACY_FLOAT_XFERMODES
-#endif
-
 ///////////////////////// Imported from BUILD.gn and skia_common.gypi
 
 /* In some places Skia can use static initializers for global initialization,

skia/skia_test_expectations.txt

@@ -48,4 +48,39 @@
 #
 # START OVERRIDES HERE
 
+# https://codereview.chromium.org/1143923003/
+crbug.com/490188 css3/blending/background-blend-mode-crossfade-image-gradient.html [ NeedsManualRebaseline ]
+crbug.com/490188 css3/blending/background-blend-mode-default-value.html [ NeedsManualRebaseline ]
+crbug.com/490188 css3/blending/background-blend-mode-gif-color-2.html [ NeedsManualRebaseline ]
+crbug.com/490188 css3/blending/background-blend-mode-gif-color.html [ NeedsManualRebaseline ]
+crbug.com/490188 css3/blending/background-blend-mode-gradient-color.html [ NeedsManualRebaseline ]
+crbug.com/490188 css3/blending/background-blend-mode-gradient-gradient.html [ NeedsManualRebaseline ]
+crbug.com/490188 css3/blending/background-blend-mode-gradient-image.html [ NeedsManualRebaseline ]
+crbug.com/490188 css3/blending/background-blend-mode-image-color.html [ NeedsManualRebaseline ]
+crbug.com/490188 css3/blending/background-blend-mode-image-image.html [ NeedsManualRebaseline ]
+crbug.com/490188 css3/blending/background-blend-mode-image-svg.html [ NeedsManualRebaseline ]
+crbug.com/490188 css3/blending/background-blend-mode-tiled-gradient.html [ NeedsManualRebaseline ]
+crbug.com/490188 css3/blending/effect-background-blend-mode-stacking.html [ NeedsManualRebaseline ]
+crbug.com/490188 css3/blending/effect-background-blend-mode-tiled.html [ NeedsManualRebaseline ]
+crbug.com/490188 css3/blending/effect-background-blend-mode.html [ NeedsManualRebaseline ]
+crbug.com/490188 css3/blending/mix-blend-mode-isolated-group-1.html [ NeedsManualRebaseline ]
+crbug.com/490188 css3/blending/mix-blend-mode-isolated-group-2.html [ NeedsManualRebaseline ]
+crbug.com/490188 css3/blending/mix-blend-mode-isolated-group-3.html [ NeedsManualRebaseline ]
+crbug.com/490188 css3/blending/svg-blend-exclusion.html [ Pass ImageOnlyFailure ]
+crbug.com/490188 css3/blending/svg-blend-screen.html [ Pass ImageOnlyFailure ]
+crbug.com/490188 css3/filters/effect-reference-colorspace.html [ NeedsManualRebaseline ]
+crbug.com/490188 css3/filters/effect-reference-subregion.html [ NeedsManualRebaseline ]
+crbug.com/490188 css3/filters/effect-reference.html [ NeedsManualRebaseline ]
+crbug.com/490188 fast/canvas/canvas-composite-shadow.html [ NeedsManualRebaseline ]
+crbug.com/490188 fast/canvas/canvas-composite-transformclip.html [ NeedsManualRebaseline ]
+crbug.com/490188 fast/canvas/canvas-composite.html [ NeedsManualRebaseline ]
+crbug.com/490188 svg/filters/feBlend-all-modes.html [ NeedsManualRebaseline ]
+crbug.com/490188 virtual/display_list_2d_canvas/fast/canvas/canvas-composite-shadow.html [ NeedsManualRebaseline ]
+crbug.com/490188 virtual/display_list_2d_canvas/fast/canvas/canvas-composite-transformclip.html [ NeedsManualRebaseline ]
+crbug.com/490188 virtual/display_list_2d_canvas/fast/canvas/canvas-composite.html [ NeedsManualRebaseline ]
+crbug.com/490188 virtual/slimmingpaint/css3/filters/effect-reference-colorspace.html [ NeedsManualRebaseline ]
+crbug.com/490188 virtual/slimmingpaint/css3/filters/effect-reference-subregion.html [ NeedsManualRebaseline ]
+crbug.com/490188 virtual/slimmingpaint/css3/filters/effect-reference.html [ NeedsManualRebaseline ]
+crbug.com/490188 virtual/slimmingpaint/svg/filters/feBlend-all-modes.html [ NeedsManualRebaseline ]
+
 # END OVERRIDES HERE (this line ensures that the file is newline-terminated)