Fix SkTextBlob offset semantics.

src/gpu/GrDistanceFieldTextContext.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 GrDistanceFieldTextContext_DEFINED
 #define GrDistanceFieldTextContext_DEFINED
 
 #include "GrTextContext.h"
 
 class GrTextStrike;
 
 /*
  * This class implements GrTextContext using distance field fonts
  */
 class GrDistanceFieldTextContext : public GrTextContext {
 public:
     GrDistanceFieldTextContext(GrContext*, const SkDeviceProperties&, bool enable);
     virtual ~GrDistanceFieldTextContext();
 
     virtual void drawText(const GrPaint&, const SkPaint&, const char text[], size_t byteLength,
                           SkScalar x, SkScalar y) SK_OVERRIDE;
     virtual void drawPosText(const GrPaint&, const SkPaint&,
                              const char text[], size_t byteLength,
-                             const SkScalar pos[], SkScalar constY,
-                             int scalarsPerPosition) SK_OVERRIDE;
+                             const SkScalar pos[], int scalarsPerPosition,
+                             const SkPoint& offset) SK_OVERRIDE;
 
     virtual bool canDraw(const SkPaint& paint) SK_OVERRIDE;
 
 private:
     GrTextStrike*           fStrike;
     SkScalar                fTextRatio;
     bool                    fUseLCDText;
     bool                    fEnableDFRendering;
     SkAutoTUnref<GrEffect>  fCachedEffect;
     // Used to check whether fCachedEffect is still valid.
@@ skipping 16 matching lines @@
     };
 
     void*                   fVertices;
     int32_t                 fMaxVertices;
     GrTexture*              fCurrTexture;
     int                     fCurrVertex;
     SkRect                  fVertexBounds;
 };
 
 #endif