add counting to glyphcache, and refactor some for clarity

src/core/SkGlyphCache.h

Index: src/core/SkGlyphCache.h
diff --git a/src/core/SkGlyphCache.h b/src/core/SkGlyphCache.h
index 3da7a2252f3cc7e313838d4d5ec42e3e9917943f..8447337374586feba017ccf47e916e473da18270 100644
--- a/src/core/SkGlyphCache.h
+++ b/src/core/SkGlyphCache.h
@@ -197,27 +197,6 @@ private:
     SkGlyph* lookupMetrics(uint32_t id, MetricsType);
     static bool DetachProc(const SkGlyphCache*, void*) { return true; }
 
-    void detach(SkGlyphCache** head) {
-        if (fPrev) {
-            fPrev->fNext = fNext;
-        } else {
-            *head = fNext;
-        }
-        if (fNext) {
-            fNext->fPrev = fPrev;
-        }
-        fPrev = fNext = NULL;
-    }
-
-    void attachToHead(SkGlyphCache** head) {
-        SkASSERT(NULL == fPrev && NULL == fNext);
-        if (*head) {
-            (*head)->fPrev = this;
-            fNext = *head;
-        }
-        *head = this;
-    }
-
     SkGlyphCache*       fNext, *fPrev;
     SkDescriptor*       fDesc;
     SkScalerContext*    fScalerContext;
@@ -258,9 +237,6 @@ private:
     AuxProcRec* fAuxProcList;
     void invokeAndRemoveAuxProcs();
 
-    // This relies on the caller to have already acquired the mutex to access the global cache
-    static size_t InternalFreeCache(SkGlyphCache_Globals*, size_t bytesNeeded);
-
     inline static SkGlyphCache* FindTail(SkGlyphCache* head);
 
     friend class SkGlyphCache_Globals;