Remove hasMixedSamples() from GrPipelineBuilder

src/gpu/GrXferProcessor.cpp

Index: src/gpu/GrXferProcessor.cpp
diff --git a/src/gpu/GrXferProcessor.cpp b/src/gpu/GrXferProcessor.cpp
index 3e2ffaa660a2cc625af44c80a026ab22fd0c8578..910b873e861aa42a893da1cb2302ca03b2913a76 100644
--- a/src/gpu/GrXferProcessor.cpp
+++ b/src/gpu/GrXferProcessor.cpp
@@ -197,7 +197,7 @@ GrXferProcessor* GrXPFactory::createXferProcessor(const GrPipelineOptimizations&
                                                   const DstTexture* dstTexture,
                                                   const GrCaps& caps) const {
 #ifdef SK_DEBUG
-    if (this->willReadDstColor(caps, optimizations, hasMixedSamples)) {
+    if (this->willReadDstColor(caps, optimizations)) {
         if (!caps.shaderCaps()->dstReadInShaderSupport()) {
             SkASSERT(dstTexture && dstTexture->texture());
         } else {
@@ -212,15 +212,12 @@ GrXferProcessor* GrXPFactory::createXferProcessor(const GrPipelineOptimizations&
 }
 
 bool GrXPFactory::willNeedDstTexture(const GrCaps& caps,
-                                     const GrPipelineOptimizations& optimizations,
-                                     bool hasMixedSamples) const {
-    return (this->willReadDstColor(caps, optimizations, hasMixedSamples) &&
+                                     const GrPipelineOptimizations& optimizations) const {
+    return (this->willReadDstColor(caps, optimizations) &&
             !caps.shaderCaps()->dstReadInShaderSupport());
 }
 
 bool GrXPFactory::willReadDstColor(const GrCaps& caps,
-                                   const GrPipelineOptimizations& optimizations,
-                                   bool hasMixedSamples) const {
-    return optimizations.fOverrides.fUsePLSDstRead || this->onWillReadDstColor(caps, optimizations,
-                                                                               hasMixedSamples);
+                                   const GrPipelineOptimizations& optimizations) const {
+    return optimizations.fOverrides.fUsePLSDstRead || this->onWillReadDstColor(caps, optimizations);
 }