allocate memory manually in SkLiteDL

src/core/SkLiteDL.h

Index: src/core/SkLiteDL.h
diff --git a/src/core/SkLiteDL.h b/src/core/SkLiteDL.h
index a0c168505a60655c25b22484a1222bac444da028..27e3f276456e7fdf7bcdf93b91fe22ad1e09f69b 100644
--- a/src/core/SkLiteDL.h
+++ b/src/core/SkLiteDL.h
@@ -86,10 +86,20 @@ private:
     SkRect   onGetBounds() override;
     void onDraw(SkCanvas*) override;
 
-    SkLiteDL*          fNext;
-    int                fUsesRemaining;
-    SkRect             fBounds;
-    SkTDArray<uint8_t> fBytes;
+    template <typename T, typename... Args>
+    void* push(size_t, Args&&...);
+
+    template <typename Fn>
+    void map(Fn&& fn);
+
+    SkAutoTMalloc<uint8_t> fBytes;
+    size_t                 fUsed;
+    size_t                 fReserved;
+    SkRect                 fBounds;
+
+    // Only used for freelisting.
+    SkLiteDL* fNext;
+    int       fUsesRemaining;
 };
 
 #endif//SkLiteDL_DEFINED