Make textures register with GrResourceCache2 as scratch.

src/gpu/GrTexture.cpp

Index: src/gpu/GrTexture.cpp
diff --git a/src/gpu/GrTexture.cpp b/src/gpu/GrTexture.cpp
index fdde9a322c268d9acfb0069748cf0d1bba26c319..bcff356e933ed03a81c3dcdde0ff11d00cdbe8ef 100644
--- a/src/gpu/GrTexture.cpp
+++ b/src/gpu/GrTexture.cpp
@@ -207,6 +207,11 @@ GrSurfaceOrigin resolve_origin(const GrTextureDesc& desc) {
 }
 
 //////////////////////////////////////////////////////////////////////////////
+GrTextureImpl::GrTextureImpl(GrGpu* gpu, bool isWrapped, const GrTextureDesc& desc)
+    : INHERITED(gpu, isWrapped, desc)
+    , fMipMapsStatus(kNotAllocated_MipMapsStatus) {
+    this->setScratchKey(ComputeScratchKey(desc));
+}
 
 GrResourceKey GrTextureImpl::ComputeKey(const GrGpu* gpu,
                                     const GrTextureParams* params,