Use an array of nonpurgeable resources in GrResourceCache

include/gpu/GrGpuResource.h

Index: include/gpu/GrGpuResource.h
diff --git a/include/gpu/GrGpuResource.h b/include/gpu/GrGpuResource.h
index 8a8b0b28c36546c1dfcf7b510bfb754de4dec70b..eae164b5349c5d3b92617286b4d94e83bddf3960 100644
--- a/include/gpu/GrGpuResource.h
+++ b/include/gpu/GrGpuResource.h
@@ -12,7 +12,6 @@
 #include "GrTypesPriv.h"
 #include "SkData.h"
 #include "SkInstCnt.h"
-#include "SkTInternalLList.h"
 
 class GrContext;
 class GrGpu;
@@ -283,10 +282,6 @@ private:
 
     static uint32_t CreateUniqueID();
 
-    // We're in an internal doubly linked list owned by GrResourceCache. TODO: Replace this with an
-    // array of unpurgeable resources in the cache.
-    SK_DECLARE_INTERNAL_LLIST_INTERFACE(GrGpuResource);
-
     // These are used for cache bookkeeping
     int                         fCacheArrayIndex;
     uint32_t                    fTimestamp;