Revert of Make GrTextContext be owned by the GrDrawContext

src/image/SkImage_Gpu.cpp

Index: src/image/SkImage_Gpu.cpp
diff --git a/src/image/SkImage_Gpu.cpp b/src/image/SkImage_Gpu.cpp
index dfb8f921704ecb56ee3e5b877f7e1c36342431e6..eaaed8ae82fd037d59fc5e40f43fe465b6a96f96 100644
--- a/src/image/SkImage_Gpu.cpp
+++ b/src/image/SkImage_Gpu.cpp
@@ -228,8 +228,8 @@
 
     const SkRect rect = SkRect::MakeWH(SkIntToScalar(dstDesc.fWidth),
                                        SkIntToScalar(dstDesc.fHeight));
-    GrDrawContext* drawContext = ctx->drawContext();
-    drawContext->drawRect(dst->asRenderTarget(), GrClip::WideOpen(), paint, SkMatrix::I(), rect);
+    ctx->drawContext()->drawRect(dst->asRenderTarget(), GrClip::WideOpen(), paint, SkMatrix::I(),
+                                 rect);
     ctx->flushSurfaceWrites(dst);
     return SkNEW_ARGS(SkImage_Gpu, (dstDesc.fWidth, dstDesc.fHeight, kOpaque_SkAlphaType, dst, 0,
                                     budgeted));