Add GrResourceCache2.

include/core/SkTInternalLList.h

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkTInternalLList_DEFINED
 #define SkTInternalLList_DEFINED
 
@@ skipping 53 matching lines @@
         }
 
         entry->fPrev = NULL;
         entry->fNext = NULL;
 
 #ifdef SK_DEBUG
         entry->fList = NULL;
 #endif
     }
 
+    void removeHead() {
+        SkASSERT(NULL != fHead && NULL != fTail);
+        SkASSERT(NULL = fHead->fPrev);

[mtklein, 2014/08/15 16:02:43]

" NULL = " ಠ_ಠ

[bsalomon, 2014/08/19 15:16:08]

ha, it turns out I didn't actually need this and it wasn't being compiled

+
+        T* next = fHead->fNext;
+
+        if (NULL != next) {
+            next->fPrev = NULL;
+        } else {
+            fTail = NULL;
+        }
+
+        fHead->fPrev = NULL;
+        fHead->fNext = NULL;
+
+#ifdef SK_DEBUG
+        fHead->fList = NULL;
+#endif
+
+        fHead = next;
+    }
+
     void addToHead(T* entry) {
         SkASSERT(NULL == entry->fPrev && NULL == entry->fNext);
         SkASSERT(NULL == entry->fList);
 
         entry->fPrev = NULL;
         entry->fNext = fHead;
         if (NULL != fHead) {
             fHead->fPrev = entry;
         }
         fHead = entry;
@@ skipping 179 matching lines @@
 #endif // SK_DEBUG
 
 private:
     T* fHead;
     T* fTail;
 
     typedef SkNoncopyable INHERITED;
 };
 
 #endif