Only recycle "kSampler2D" textures as scratch

src/gpu/GrTexture.cpp

Index: src/gpu/GrTexture.cpp
diff --git a/src/gpu/GrTexture.cpp b/src/gpu/GrTexture.cpp
index 28746b93056fa4361230f5e973814f24d60b4c36..2211e68a4da4572b9da543caa11c1ed82e103106 100644
--- a/src/gpu/GrTexture.cpp
+++ b/src/gpu/GrTexture.cpp
@@ -92,7 +92,8 @@ GrTexture::GrTexture(GrGpu* gpu, LifeCycle lifeCycle, const GrSurfaceDesc& desc,
     : INHERITED(gpu, lifeCycle, desc)
     , fSamplerType(samplerType) {
     if (!this->isExternal() && !GrPixelConfigIsCompressed(desc.fConfig) &&
-        !desc.fTextureStorageAllocator.fAllocateTextureStorage) {
+        !desc.fTextureStorageAllocator.fAllocateTextureStorage &&
+        kSampler2D_GrSLType == samplerType) {
         GrScratchKey key;
         GrTexturePriv::ComputeScratchKey(desc, &key);
         this->setScratchKey(key);