Port most uses of SkOnce to SkLazyPtr.

include/ports/SkRemotableFontMgr.h

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkRemotableFontMgr_DEFINED
 #define SkRemotableFontMgr_DEFINED
 
@@ skipping 28 matching lines @@
 
     SkRemotableFontIdentitySet(int count, SkFontIdentity** data);
 
     int count() const { return fCount; }
     const SkFontIdentity& at(int index) const { return fData[index]; }
 
     static SkRemotableFontIdentitySet* NewEmpty();
 
 private:
     SkRemotableFontIdentitySet() : fCount(0), fData() { }
-    static void NewEmptyImpl(int);
+    static SkRemotableFontIdentitySet* NewEmptyImpl();
 
     int fCount;
     SkAutoTMalloc<SkFontIdentity> fData;
 
     typedef SkRefCnt INHERITED;
 };
 
 class SK_API SkRemotableFontMgr : public SkRefCnt {
 public:
     SK_DECLARE_INST_COUNT(SkRemotableFontMgr)
@@ skipping 83 matching lines @@
      *
      *  The caller must unref() the returned object.
      */
     virtual SkStreamAsset* getData(int dataId) const = 0;
 
 private:
     typedef SkRefCnt INHERITED;
 };
 
 #endif