cleanup friends in GrGpu

src/gpu/GrDrawTarget.h

Index: src/gpu/GrDrawTarget.h
diff --git a/src/gpu/GrDrawTarget.h b/src/gpu/GrDrawTarget.h
index 74be6460e106bffb00af354426333cf39562a071..41f9b366fca68fb1e4ef9a16470b500de8754621 100644
--- a/src/gpu/GrDrawTarget.h
+++ b/src/gpu/GrDrawTarget.h
@@ -885,9 +885,6 @@ private:
                          GrRenderTarget* renderTarget) = 0;
 
 
-    virtual void didAddGpuTraceMarker() = 0;
-    virtual void didRemoveGpuTraceMarker() = 0;
-
     // helpers for reserving vertex and index space.
     bool reserveVertexSpace(size_t vertexSize,
                             int vertexCount,
@@ -926,10 +923,6 @@ private:
     GrTraceMarkerSet                                                fActiveTraceMarkers;
     GrTraceMarkerSet                                                fStoredTraceMarkers;
 
-    // TODO fix this
-    friend class GrGpu;
-    friend class GrGpuGL;
-
     typedef SkRefCnt INHERITED;
 };