Fix SkTextBlob offset semantics.

src/utils/SkPictureUtils.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkBitmapDevice.h"
 #include "SkCanvas.h"
 #include "SkData.h"
@@ skipping 114 matching lines @@
     virtual void drawSprite(const SkDraw&, const SkBitmap& bitmap,
                             int x, int y, const SkPaint& paint) SK_OVERRIDE {
         this->addBitmap(bitmap);
     }
     virtual void drawText(const SkDraw&, const void* text, size_t len,
                           SkScalar x, SkScalar y,
                           const SkPaint& paint) SK_OVERRIDE {
         this->addBitmapFromPaint(paint);
     }
     virtual void drawPosText(const SkDraw&, const void* text, size_t len,
-                             const SkScalar pos[], SkScalar constY,
-                             int, const SkPaint& paint) SK_OVERRIDE {
+                             const SkScalar pos[], int,
+                             const SkPoint&, const SkPaint& paint) SK_OVERRIDE {
         this->addBitmapFromPaint(paint);
     }
     virtual void drawTextOnPath(const SkDraw&, const void* text, size_t len,
                                 const SkPath& path, const SkMatrix* matrix,
                                 const SkPaint& paint) SK_OVERRIDE {
         this->addBitmapFromPaint(paint);
     }
     virtual void drawVertices(const SkDraw&, SkCanvas::VertexMode, int vertexCount,
                               const SkPoint verts[], const SkPoint texs[],
                               const SkColor colors[], SkXfermode* xmode,
@@ skipping 64 matching lines @@
     canvas.clipRect(area, SkRegion::kIntersect_Op, false);
     canvas.drawPicture(pict);
 
     SkData* data = NULL;
     int count = array.count();
     if (count > 0) {
         data = SkData::NewFromMalloc(array.detach(), count * sizeof(SkPixelRef*));
     }
     return data;
 }