Use presence of a content key as non-scratch indicator

bench/GrResourceCacheBench.cpp

Index: bench/GrResourceCacheBench.cpp
diff --git a/bench/GrResourceCacheBench.cpp b/bench/GrResourceCacheBench.cpp
index 894ec14fcaf962218e0123b265dbeab24fdd34b2..6a7c89acf8925fbe6045da3daf4512fb4ea259d4 100644
--- a/bench/GrResourceCacheBench.cpp
+++ b/bench/GrResourceCacheBench.cpp
@@ -64,7 +64,14 @@ public:
     }
 
     static GrResourceKey ComputeKey(const GrTextureDesc& desc) {
-        return GrTexturePriv::ComputeScratchKey(desc);
+        GrCacheID::Key key;
+        memset(&key, 0, sizeof(key));
+        key.fData32[0] = (desc.fWidth) | (desc.fHeight << 16);
+        key.fData32[1] = desc.fConfig | desc.fSampleCnt << 16;
+        key.fData32[2] = desc.fFlags;
+        static int gType = GrResourceKey::GenerateResourceType();
+        static int gDomain = GrCacheID::GenerateDomain();
+        return GrResourceKey(GrCacheID(gDomain, key), gType, 0);
     }
 
     int fID;