Update Layer Hoisting to store its atlas texture in the resource cache

src/gpu/GrResourceCache.h

Index: src/gpu/GrResourceCache.h
diff --git a/src/gpu/GrResourceCache.h b/src/gpu/GrResourceCache.h
index 2412174121e55422a787eb468622679f2bd119f7..ed2affeae38ae8608fbe58018fa28a7a022ea3fe 100644
--- a/src/gpu/GrResourceCache.h
+++ b/src/gpu/GrResourceCache.h
@@ -182,7 +182,52 @@ public:
 
     void notifyFlushOccurred();
 
-#if GR_GPU_STATS
+#if GR_CACHE_STATS
+    struct Stats {
+        int fTotal;
+        int fNumPurgeable;
+        int fNumNonPurgeable;
+
+        int fScratch;
+        int fExternal;
+        int fBorrowed;
+        int fAdopted;
+        size_t fUnbudgetedSize;
+
+        Stats() { this->reset(); }
+
+        void reset() {
+            fTotal = 0;
+            fNumPurgeable = 0;
+            fNumNonPurgeable = 0;
+            fScratch = 0;
+            fExternal = 0;
+            fBorrowed = 0;
+            fAdopted = 0;
+            fUnbudgetedSize = 0;
+        }
+
+        void update(GrGpuResource* resource) {
+            if (resource->cacheAccess().isScratch()) {
+                ++fScratch;
+            }
+            if (resource->cacheAccess().isExternal()) {
+                ++fExternal;
+            }
+            if (resource->cacheAccess().isBorrowed()) {
+                ++fBorrowed;
+            }
+            if (resource->cacheAccess().isAdopted()) {
+                ++fAdopted;
+            }
+            if (!resource->resourcePriv().isBudgeted()) {
+                fUnbudgetedSize += resource->gpuMemorySize();
+            }
+        }
+    };
+
+    void getStats(Stats*) const;
+
     void dumpStats(SkString*) const;
 #endif