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 7774f734f8373661279e47419073ec0552bdd2c6..aefae27dd5895a36e390fc71bd16a1f33fe33d47 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;
@@ -283,11 +282,8 @@ 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);
-
-    // An index into a heap when this resource is purgeable. This is maintained by the cache.
+    // An index into a heap when this resource is purgeable or an array when not. This is maintained
+    // by the cache.
     int                         fCacheArrayIndex;
     // This value reflects how recently this resource was accessed in the cache. This is maintained
     // by the cache.