Attempt to land cache purge again [and regen bot logs if still failing]

src/gpu/GrResourceCache.h

Index: src/gpu/GrResourceCache.h
diff --git a/src/gpu/GrResourceCache.h b/src/gpu/GrResourceCache.h
index a495f565b299822aa012b14696236c327849aa02..adbfb7919ffd25b024d6f70f527e29b18d988ed2 100644
--- a/src/gpu/GrResourceCache.h
+++ b/src/gpu/GrResourceCache.h
@@ -60,7 +60,7 @@ public:
     // purged. Large values disable the feature (as the ring buffer of flush timestamps would be
     // large). This is currently the default until we decide to enable this feature
     // of the cache by default.
-    static const int    kDefaultMaxUnusedFlushes    = 1024;
+    static const int    kDefaultMaxUnusedFlushes    = 64;
 
     /** Used to access functionality needed by GrGpuResource for lifetime management. */
     class ResourceAccess;