Remove GrStencilSettings from GrPipeline

src/gpu/GrStencilSettings.cpp

Index: src/gpu/GrStencilSettings.cpp
diff --git a/src/gpu/GrStencilSettings.cpp b/src/gpu/GrStencilSettings.cpp
index d3216db0ce65c280c806018fc3a0e98adc161b1e..cec8bee97bde06b0d00a617f92624f0d1b6eb7e4 100644
--- a/src/gpu/GrStencilSettings.cpp
+++ b/src/gpu/GrStencilSettings.cpp
@@ -28,6 +28,7 @@ void GrStencilSettings::reset(const GrUserStencilSettings& user, bool hasStencil
                               int numStencilBits) {
     uint16_t frontFlags = user.fFrontFlags[hasStencilClip];
     if (frontFlags & kSingleSided_StencilFlag) {
+        SkASSERT(frontFlags == user.fBackFlags[hasStencilClip]);
         fFlags = frontFlags;
         if (!this->isDisabled()) {
             fFront.reset(user.fFront, hasStencilClip, numStencilBits);