Remove unused enum value and member of GrGpuObject

src/gpu/GrGpuObject.cpp

Index: src/gpu/GrGpuObject.cpp
diff --git a/src/gpu/GrGpuObject.cpp b/src/gpu/GrGpuObject.cpp
index 43a86f2d51bace98a209eac9294e64f291191c5e..fff2a2fd8f2c94a898b1d76f7ca52b48ae7dc87e 100644
--- a/src/gpu/GrGpuObject.cpp
+++ b/src/gpu/GrGpuObject.cpp
@@ -12,7 +12,6 @@
 
 GrGpuObject::GrGpuObject(GrGpu* gpu, bool isWrapped) {
     fGpu              = gpu;
-    fDeferredRefCount = 0;
     if (isWrapped) {
         fFlags = kWrapped_FlagBit;
     } else {
@@ -23,7 +22,6 @@ GrGpuObject::GrGpuObject(GrGpu* gpu, bool isWrapped) {
 
 GrGpuObject::~GrGpuObject() {
     // subclass should have released this.
-    SkASSERT(0 == fDeferredRefCount);
     SkASSERT(this->wasDestroyed());
 }