Purge the SkLiteDL freelist when PurgeAllCaches() is called.

Seems like the polite thing to do.

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2228953002

Review-Url: https://codereview.chromium.org/2228953002

1 files changed, 9 insertions, 0 deletions

diff --git a/src/core/SkLiteDL.cpp b/src/core/SkLiteDL.cpp
index 778f5c9563..329edb046b 100644
--- a/src/core/SkLiteDL.cpp
+++ b/src/core/SkLiteDL.cpp
@@ -711,3 +711,12 @@ void SkLiteDL::internal_dispose() const {
 
     delete this;
 }
+
+void SkLiteDL::PurgeFreelist() {
+    SkAutoMutexAcquire lock(gFreeStackLock);
+    while (gFreeStack) {
+        SkLiteDL* top = gFreeStack;
+        gFreeStack = gFreeStack->fNext;
+        delete top;   // Calling unref() here would just put it back on the list!
+    }
+}