Track tail of strike cache

Change-Id: Ic5d5ae5d4c45d0bc5b82dd2257752184a8b529d0
Reviewed-on: https://skia-review.googlesource.com/123935
Commit-Queue: Herb Derby <herb@google.com>
Commit-Queue: Ben Wagner <bungeman@google.com>
Auto-Submit: Herb Derby <herb@google.com>
Reviewed-by: Ben Wagner <bungeman@google.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/src/core/SkStrikeCache.h b/src/core/SkStrikeCache.h
index d4dc13927c..3e199da1e9 100644
--- a/src/core/SkStrikeCache.h
+++ b/src/core/SkStrikeCache.h
@@ -144,7 +144,7 @@ private:
 
     // The following methods can only be called when mutex is already held.
     Node* internalGetHead() const { return fHead; }
-    Node* internalGetTail() const;
+    Node* internalGetTail() const { return fTail; }
     void internalDetachCache(Node*);
     void internalAttachToHead(Node*);
 
@@ -157,6 +157,7 @@ private:
 
     mutable SkSpinlock fLock;
     Node*              fHead{nullptr};
+    Node*              fTail{nullptr};
     size_t             fTotalMemoryUsed{0};
     size_t             fCacheSizeLimit{SK_DEFAULT_FONT_CACHE_LIMIT};
     int32_t            fCacheCountLimit{SK_DEFAULT_FONT_CACHE_COUNT_LIMIT};