Remove hasMixedSamples() from GrPipelineBuilder

tools/debugger/SkOverdrawMode.cpp

 /*
  * Copyright 2016 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkColorPriv.h"
 #include "SkOverdrawMode.h"
 #include "SkString.h"
@@ skipping 211 matching lines @@
         this->initClassID<GrOverdrawXPFactory>();
     }
 
     GrXferProcessor* onCreateXferProcessor(const GrCaps& caps,
                                            const GrPipelineOptimizations& optimizations,
                                            bool hasMixedSamples,
                                            const DstTexture* dstTexture) const override {
         return new OverdrawXP(dstTexture, hasMixedSamples);
     }
 
-    bool onWillReadDstColor(const GrCaps& caps,
-                            const GrPipelineOptimizations& optimizations,
-                            bool hasMixedSamples) const override {
+    bool onWillReadDstColor(const GrCaps&, const GrPipelineOptimizations&) const override {
         return true;
     }
 
     bool onIsEqual(const GrXPFactory& xpfBase) const override { return true; }
 
     GR_DECLARE_XP_FACTORY_TEST;
 
     typedef GrXPFactory INHERITED;
 };
 
@@ skipping 70 matching lines @@
 
 sk_sp<SkFlattenable> SkOverdrawXfermode::CreateProc(SkReadBuffer& buffer) {
     return sk_sp<SkFlattenable>(Create());
 }
 
 sk_sp<SkXfermode> SkOverdrawMode::Make() { return sk_make_sp<SkOverdrawXfermode>(); }
 
 SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_START(SkOverdrawMode)
     SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkOverdrawXfermode)
 SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_END