Change drawText() to generate positions and send to drawPosText()

include/core/SkPaint.h

Index: include/core/SkPaint.h
diff --git a/include/core/SkPaint.h b/include/core/SkPaint.h
index 9f477d867b152f495dd98bad2438ac01abaf348f..21ad3eab20aec29d546c67ba477f01c9a58fc4d8 100644
--- a/include/core/SkPaint.h
+++ b/include/core/SkPaint.h
@@ -1102,6 +1102,7 @@ private:
     friend class SkDraw;
     friend class SkGraphics; // So Term() can be called.
     friend class SkPDFDevice;
+    friend class GrTextContext;
     friend class GrBitmapTextContext;
     friend class GrDistanceFieldTextContext;
     friend class GrStencilAndCoverTextContext;