Clean up dead xfermode opts code.

src/core/Sk4pxXfermode.h

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef Sk4pxXfermode_DEFINED
 #define Sk4pxXfermode_DEFINED
 
 #include "Sk4px.h"
 #include "SkPMFloat.h"
+#include "SkXfermode_proccoeff.h"
 
 // This file is possibly included into multiple .cpp files.
 // Each gets its own independent instantiation by wrapping in an anonymous namespace.
 namespace {
 
 // Most xfermodes can be done most efficiently 4 pixels at a time in 8 or 16-bit fixed point.
 #define XFERMODE(Name)                                                    \
     struct Name {                                                         \
         static Sk4px Xfer(const Sk4px&, const Sk4px&);                    \
         static const SkXfermode::Mode kMode = SkXfermode::k##Name##_Mode; \
@@ skipping 245 matching lines @@
         case SkXfermode::kDstOut_Mode:     return SkT4pxXfermode<DstOut>::Create(rec);
         case SkXfermode::kSrcATop_Mode:    return SkT4pxXfermode<SrcATop>::Create(rec);
         case SkXfermode::kDstATop_Mode:    return SkT4pxXfermode<DstATop>::Create(rec);
         case SkXfermode::kXor_Mode:        return SkT4pxXfermode<Xor>::Create(rec);
         case SkXfermode::kPlus_Mode:       return SkT4pxXfermode<Plus>::Create(rec);
         case SkXfermode::kModulate_Mode:   return SkT4pxXfermode<Modulate>::Create(rec);
         case SkXfermode::kScreen_Mode:     return SkT4pxXfermode<Screen>::Create(rec);
         case SkXfermode::kMultiply_Mode:   return SkT4pxXfermode<Multiply>::Create(rec);
         case SkXfermode::kDifference_Mode: return SkT4pxXfermode<Difference>::Create(rec);
         case SkXfermode::kExclusion_Mode:  return SkT4pxXfermode<Exclusion>::Create(rec);
-#if !defined(SK_SUPPORT_LEGACY_XFERMODES)  // For staging in Chrome (layout tests).
         case SkXfermode::kHardLight_Mode:  return SkT4pxXfermode<HardLight>::Create(rec);
         case SkXfermode::kOverlay_Mode:    return SkT4pxXfermode<Overlay>::Create(rec);
         case SkXfermode::kDarken_Mode:     return SkT4pxXfermode<Darken>::Create(rec);
         case SkXfermode::kLighten_Mode:    return SkT4pxXfermode<Lighten>::Create(rec);
 
         case SkXfermode::kColorDodge_Mode: return SkTPMFloatXfermode<ColorDodge>::Create(rec);
         case SkXfermode::kColorBurn_Mode:  return SkTPMFloatXfermode<ColorBurn>::Create(rec);
         case SkXfermode::kSoftLight_Mode:  return SkTPMFloatXfermode<SoftLight>::Create(rec);
-#endif
         default: break;
     }
 #endif
     return nullptr;
 }
 
 } // namespace
 
 #endif//Sk4pxXfermode_DEFINED