First pass at implementing Canvas.drawPosText() in GL

Change-Id: Ia3ac347e95d57eb86c63045156c8dbc0572b03cb
diff --git a/libs/hwui/OpenGLRenderer.h b/libs/hwui/OpenGLRenderer.h
index 019e9b2..a9cda47 100644
--- a/libs/hwui/OpenGLRenderer.h
+++ b/libs/hwui/OpenGLRenderer.h
@@ -124,6 +124,8 @@
     virtual void drawPoints(float* points, int count, SkPaint* paint);
     virtual void drawText(const char* text, int bytesCount, int count, float x, float y,
             SkPaint* paint, float length = -1.0f);
+    virtual void drawPosText(const char* text, int bytesCount, int count, const float* positions,
+            SkPaint* paint);
 
     virtual void resetShader();
     virtual void setupShader(SkiaShader* shader);