Refactor how we store and use samplers in Ganesh

src/effects/SkBlurMaskFilter.cpp

Index: src/effects/SkBlurMaskFilter.cpp
diff --git a/src/effects/SkBlurMaskFilter.cpp b/src/effects/SkBlurMaskFilter.cpp
index a1acf659ba31e99469c04633ab257c6569d7ea34..8b87c93ccaa53e3be1e4fec3e81ee2201e945098 100644
--- a/src/effects/SkBlurMaskFilter.cpp
+++ b/src/effects/SkBlurMaskFilter.cpp
@@ -761,9 +761,10 @@ void GrGLRectBlurEffect::emitCode(EmitArgs& args) {
     fragBuilder->codeAppendf("%s vec2 wh = smallDims - vec2(center,center);",
                              precisionString.c_str());
 
-    OutputRectBlurProfileLookup(fragBuilder, args.fTexSamplers[0], "horiz_lookup", profileSizeName,
+    const GrGLSLSampler& sampler = uniformHandler->getSampler(args.fTexSamplers[0]);
+    OutputRectBlurProfileLookup(fragBuilder, sampler, "horiz_lookup", profileSizeName,
                                 "translatedPos.x", "width", "wh.x");
-    OutputRectBlurProfileLookup(fragBuilder, args.fTexSamplers[0], "vert_lookup", profileSizeName,
+    OutputRectBlurProfileLookup(fragBuilder, sampler, "vert_lookup", profileSizeName,
                                 "translatedPos.y", "height", "wh.y");
 
     fragBuilder->codeAppendf("float final = horiz_lookup * vert_lookup;");
@@ -1120,7 +1121,9 @@ void GrGLRRectBlurEffect::emitCode(EmitArgs& args) {
     fragBuilder->codeAppendf("vec2 texCoord = translatedFragPos / proxyDims;");
 
     fragBuilder->codeAppendf("%s = ", args.fOutputColor);
-    fragBuilder->appendTextureLookupAndModulate(args.fInputColor, args.fTexSamplers[0], "texCoord");
+    fragBuilder->appendTextureLookupAndModulate(args.fInputColor,
+                                                uniformHandler->getSampler(args.fTexSamplers[0]),
+                                                "texCoord");
     fragBuilder->codeAppend(";");
 }