Fix SkTextBlob offset semantics.

src/pdf/SkPDFDeviceFlattener.h

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkPDFDeviceFlattener_DEFINED
 #define SkPDFDeviceFlattener_DEFINED
 
@@ skipping 19 matching lines @@
     virtual void drawPoints(const SkDraw&, SkCanvas::PointMode mode,
                             size_t count, const SkPoint[],
                             const SkPaint& paint) SK_OVERRIDE;
     virtual void drawRect(const SkDraw&, const SkRect& r, const SkPaint& paint);
     virtual void drawPath(const SkDraw&, const SkPath& origpath,
                           const SkPaint& paint, const SkMatrix* prePathMatrix,
                           bool pathIsMutable) SK_OVERRIDE;
     virtual void drawText(const SkDraw&, const void* text, size_t len,
                           SkScalar x, SkScalar y, const SkPaint&) SK_OVERRIDE;
     virtual void drawPosText(const SkDraw&, const void* text, size_t len,
-                             const SkScalar pos[], SkScalar constY,
-                             int scalarsPerPos, const SkPaint&) SK_OVERRIDE;
+                             const SkScalar pos[], int scalarsPerPos,
+                             const SkPoint& offset, const SkPaint&) SK_OVERRIDE;
     virtual void drawTextOnPath(const SkDraw&, const void* text, size_t len,
                                 const SkPath& path, const SkMatrix* matrix,
                                 const SkPaint& paint) SK_OVERRIDE;
 private:
 
     bool mustFlatten(const SkDraw& d) const;
     bool mustPathText(const SkDraw& d, const SkPaint& paint);
 
     friend class SkDocument_PDF;
 };
 
 #endif  // SkPDFDeviceFlattener_DEFINED