Make GrTextContext be owned by the GrDrawContext

src/gpu/SkGpuDevice.h

Index: src/gpu/SkGpuDevice.h
diff --git a/src/gpu/SkGpuDevice.h b/src/gpu/SkGpuDevice.h
index c06cdc2ed4a77ec5d7cd66b82f2065dcfd18a632..cf85cd967398d2cb7fa25ef15944a9da1daf89c9 100644
--- a/src/gpu/SkGpuDevice.h
+++ b/src/gpu/SkGpuDevice.h
@@ -23,7 +23,6 @@ struct GrSkDrawProcs;
 
 class GrAccelData;
 struct GrCachedLayer;
-class GrTextContext;
 
 /**
  *  Subclass of SkBaseDevice, which directs all drawing to the GrGpu owned by the
@@ -151,7 +150,6 @@ private:
     SkAutoTUnref<const SkClipStack> fClipStack;
     SkIPoint                        fClipOrigin;
     GrClip                          fClip;
-    GrTextContext*                  fTextContext;
     SkAutoTUnref<GrDrawContext>     fDrawContext;
     SkSurfaceProps                  fSurfaceProps;
     GrRenderTarget*                 fRenderTarget;
@@ -219,7 +217,6 @@ private:
                                               int sampleCount);
 
     friend class GrAtlasTextContext;
-    friend class GrTextContext;
     typedef SkBaseDevice INHERITED;
 };