cleanup GrContext resource cache api

R=robertphillips@google.com

Author: bsalomon@google.com

Review URL: https://codereview.chromium.org/275563005

git-svn-id: http://skia.googlecode.com/svn/trunk@14669 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/gpu/GrTest.cpp b/src/gpu/GrTest.cpp
index c434322..10dc034 100644
--- a/src/gpu/GrTest.cpp
+++ b/src/gpu/GrTest.cpp
@@ -38,5 +38,5 @@
 }
 
 void GrContext::purgeAllUnlockedResources() {
-    fTextureCache->purgeAllUnlocked();
+    fResourceCache->purgeAllUnlocked();
 }