Remove hasMixedSamples() from GrPipelineBuilder

include/gpu/GrXferProcessor.h

Index: include/gpu/GrXferProcessor.h
diff --git a/include/gpu/GrXferProcessor.h b/include/gpu/GrXferProcessor.h
index 3a698143c32322a4345eb8fd67dffe226fe77094..1d4717e1569dd4f1799582242b859bf9d6e39fba 100644
--- a/include/gpu/GrXferProcessor.h
+++ b/include/gpu/GrXferProcessor.h
@@ -323,8 +323,7 @@ public:
     virtual void getInvariantBlendedColor(const GrProcOptInfo& colorPOI,
                                           InvariantBlendedColor*) const = 0;
 
-    bool willNeedDstTexture(const GrCaps& caps, const GrPipelineOptimizations& optimizations, 
-                            bool hasMixedSamples) const;
+    bool willNeedDstTexture(const GrCaps& caps, const GrPipelineOptimizations& optimizations) const;
 
     bool isEqual(const GrXPFactory& that) const {
         if (this->classID() != that.classID()) {
@@ -358,16 +357,12 @@ private:
 
     virtual bool onIsEqual(const GrXPFactory&) const = 0;
 
-    bool willReadDstColor(const GrCaps& caps,
-                          const GrPipelineOptimizations& optimizations,
-                          bool hasMixedSamples) const;
+    bool willReadDstColor(const GrCaps&, const GrPipelineOptimizations&) const;
     /**
      *  Returns true if the XP generated by this factory will explicitly read dst in the fragment
      *  shader.
      */
-    virtual bool onWillReadDstColor(const GrCaps& caps,
-                                    const GrPipelineOptimizations& optimizations,
-                                    bool hasMixedSamples) const = 0;
+    virtual bool onWillReadDstColor(const GrCaps&, const GrPipelineOptimizations&) const = 0;
 
     static uint32_t GenClassID() {
         // fCurrXPFactoryID has been initialized to kIllegalXPFactoryID. The