Make uncached textures uncached from the get go.

This avoids the problem of a newly created uncached texture causing a purge of cached resources.

BUG=chromium:445885

Review URL: https://codereview.chromium.org/846303002
diff --git a/bench/GrResourceCacheBench.cpp b/bench/GrResourceCacheBench.cpp
index 491823b..2a593c5 100644
--- a/bench/GrResourceCacheBench.cpp
+++ b/bench/GrResourceCacheBench.cpp
@@ -24,7 +24,7 @@
 public:
     SK_DECLARE_INST_COUNT(BenchResource);
     BenchResource (GrGpu* gpu)
-        : INHERITED(gpu, false) {
+        : INHERITED(gpu, kCached_LifeCycle) {
         this->registerWithCache();
     }