update textblob api to use sk_sp

include/core/SkTextBlob.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 SkTextBlob_DEFINED
 #define SkTextBlob_DEFINED
 
@@ skipping 25 matching lines @@
      */
     void flatten(SkWriteBuffer&) const;
 
     /**
      *  Recreate an SkTextBlob that was serialized into a buffer.
      *
      *  @param  SkReadBuffer Serialized blob data.
      *  @return A new SkTextBlob representing the serialized data, or NULL if the buffer is
      *          invalid.
      */
-    static const SkTextBlob* CreateFromBuffer(SkReadBuffer&);
+    static sk_sp<SkTextBlob> MakeFromBuffer(SkReadBuffer&);
+
+    static const SkTextBlob* CreateFromBuffer(SkReadBuffer& buffer) {
+        return MakeFromBuffer(buffer).release();
+    }
 
     enum GlyphPositioning {
         kDefault_Positioning      = 0, // Default glyph advances -- zero scalars per glyph.
         kHorizontal_Positioning   = 1, // Horizontal positioning -- one scalar per glyph.
         kFull_Positioning         = 2  // Point positioning -- two scalars per glyph.
     };
 
 private:
     friend class SkNVRefCnt<SkTextBlob>;
     class RunRecord;
@@ skipping 35 matching lines @@
 class SK_API SkTextBlobBuilder {
 public:
     SkTextBlobBuilder();
 
     ~SkTextBlobBuilder();
 
     /**
      *  Returns an immutable SkTextBlob for the current runs/glyphs. The builder is reset and
      *  can be reused.
      */
-    const SkTextBlob* build();
+    sk_sp<SkTextBlob> make();
+
+    const SkTextBlob* build() {
+        return this->make().release();
+    }
 
     /**
      *  Glyph and position buffers associated with a run.
      *
      *  A run is a sequence of glyphs sharing the same font metrics and positioning mode.
      */
     struct RunBuffer {
         SkGlyphID* glyphs;
         SkScalar* pos;
     };
@@ skipping 62 matching lines @@
 
     SkRect                 fBounds;
     int                    fRunCount;
     bool                   fDeferredBounds;
     size_t                 fLastRun; // index into fStorage
 
     RunBuffer              fCurrentRunBuffer;
 };
 
 #endif // SkTextBlob_DEFINED