Refactor how we store and use samplers in Ganesh

src/gpu/vk/GrVkUniformHandler.h

Index: src/gpu/vk/GrVkUniformHandler.h
diff --git a/src/gpu/vk/GrVkUniformHandler.h b/src/gpu/vk/GrVkUniformHandler.h
index 46d27cda7c6fb13bf4a3fe346fd8650a01a44f50..f6060b05327518ef294b14716df0f0ffcd5a7e5b 100644
--- a/src/gpu/vk/GrVkUniformHandler.h
+++ b/src/gpu/vk/GrVkUniformHandler.h
@@ -11,6 +11,7 @@
 #include "glsl/GrGLSLUniformHandler.h"
 
 #include "GrAllocator.h"
+#include "GrVkGLSLSampler.h"
 #include "glsl/GrGLSLShaderVar.h"
 
 class GrVkUniformHandler : public GrGLSLUniformHandler {
@@ -30,8 +31,6 @@ public:
     struct UniformInfo {
         GrGLSLShaderVar fVariable;
         uint32_t        fVisibility;
-        uint32_t        fSetNumber;
-        uint32_t        fBinding;
         uint32_t        fUBOffset;
     };
     typedef GrTAllocator<UniformInfo> UniformInfoArray;
@@ -61,6 +60,17 @@ private:
                                           int arrayCount,
                                           const char** outName) override;
 
+    SamplerHandle internalAddSampler(uint32_t visibility,
+                                     GrPixelConfig config,
+                                     GrSLType type,
+                                     GrSLPrecision precision,
+                                     const char* name) override;
+
+    int numSamplers() const override { return fSamplers.count(); }
+    const GrGLSLSampler& getSampler(SamplerHandle handle) const override {
+        return fSamplers[handle.toIndex()];
+    }
+
     void appendUniformDecls(GrShaderFlags, SkString*) const override;
 
     bool hasVertexUniforms() const { return fCurrentVertexUBOOffset > 0; }
@@ -73,6 +83,8 @@ private:
 
 
     UniformInfoArray fUniforms;
+    SkTArray<GrVkGLSLSampler> fSamplers;
+
     uint32_t         fCurrentVertexUBOOffset;
     uint32_t         fCurrentFragmentUBOOffset;
     uint32_t         fCurrentSamplerBinding;