Bring sk_sp to GrDrawContext

tests/RectangleTextureTest.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "Test.h"
 #if SK_SUPPORT_GPU
 #include "GrContext.h"
@@ skipping 71 matching lines @@
     SkAutoTUnref<GrTexture> src(context->textureProvider()->createTexture(
             copySrcDesc, SkBudgeted::kYes, pixels.get(), 0));
 
     context->copySurface(rectangleTexture, src);
     test_read_pixels(reporter, context, rectangleTexture, pixels.get());
 }
 
 static void test_clear(skiatest::Reporter* reporter, GrContext* context,
                        GrTexture* rectangleTexture) {
     if (rectangleTexture->asRenderTarget()) {
-        SkAutoTUnref<GrDrawContext> dc(context->drawContext(rectangleTexture->asRenderTarget()));
+        sk_sp<GrDrawContext> dc(
+                            context->drawContext(sk_ref_sp(rectangleTexture->asRenderTarget())));
         if (!dc) {
             ERRORF(reporter, "Could not get GrDrawContext for rectangle texture.");
             return;
         }
 
         // Clear the whole thing.
         GrColor color0 = GrColorPackRGBA(0xA, 0xB, 0xC, 0xD);
         dc->clear(nullptr, color0, false);
 
         int w = rectangleTexture->width();
@@ skipping 97 matching lines @@
 
         test_write_pixels(reporter, context, rectangleTexture);
 
         test_clear(reporter, context, rectangleTexture);
 
         GR_GL_CALL(glContext->gl(), DeleteTextures(1, &rectTexID));
     }
 }
 
 #endif