Revert of Refactor drawContext/RenderTarget creation

src/effects/SkMorphologyImageFilter.cpp

Index: src/effects/SkMorphologyImageFilter.cpp
diff --git a/src/effects/SkMorphologyImageFilter.cpp b/src/effects/SkMorphologyImageFilter.cpp
index 2a0f078c053fd6ed0cc13577668090b7415a6c1c..9e87fe04a41a4c00dbc41898277e0b7d7460e69f 100644
--- a/src/effects/SkMorphologyImageFilter.cpp
+++ b/src/effects/SkMorphologyImageFilter.cpp
@@ -478,18 +478,26 @@
     SkASSERT(srcTexture);
 
     // setup new clip
-    const GrClip clip(SkRect::MakeWH(SkIntToScalar(srcTexture->width()),
-                                     SkIntToScalar(srcTexture->height())));
-
-    const SkIRect dstRect = SkIRect::MakeWH(rect.width(), rect.height());
+    GrClip clip(SkRect::MakeWH(SkIntToScalar(srcTexture->width()),
+                               SkIntToScalar(srcTexture->height())));
+
+    SkIRect dstRect = SkIRect::MakeWH(rect.width(), rect.height());
+    GrSurfaceDesc desc;
+    desc.fFlags = kRenderTarget_GrSurfaceFlag;
+    desc.fWidth = rect.width();
+    desc.fHeight = rect.height();
+    desc.fConfig = kSkia8888_GrPixelConfig;
     SkIRect srcRect = rect;
 
     SkASSERT(radius.width() > 0 || radius.height() > 0);
 
     if (radius.fWidth > 0) {
-        sk_sp<GrDrawContext> dstDrawContext(context->newDrawContext(GrContext::kLoose_BackingFit,
-                                                                    rect.width(), rect.height(),
-                                                                    kSkia8888_GrPixelConfig));
+        GrTexture* scratch = context->textureProvider()->createApproxTexture(desc);
+        if (!scratch) {
+            return nullptr;
+        }
+        sk_sp<GrDrawContext> dstDrawContext(
+                                      context->drawContext(sk_ref_sp(scratch->asRenderTarget())));
         if (!dstDrawContext) {
             return nullptr;
         }
@@ -499,18 +507,21 @@
                               Gr1DKernelEffect::kX_Direction);
         SkIRect clearRect = SkIRect::MakeXYWH(dstRect.fLeft, dstRect.fBottom,
                                               dstRect.width(), radius.fHeight);
-        GrColor clearColor = GrMorphologyEffect::kErode_MorphologyType == morphType
-                                ? SK_ColorWHITE
-                                : SK_ColorTRANSPARENT;
+        GrColor clearColor = GrMorphologyEffect::kErode_MorphologyType == morphType ?
+                                SK_ColorWHITE :
+                                SK_ColorTRANSPARENT;
         dstDrawContext->clear(&clearRect, clearColor, false);
 
-        srcTexture = dstDrawContext->asTexture();
+        srcTexture.reset(scratch);
         srcRect = dstRect;
     }
     if (radius.fHeight > 0) {
-        sk_sp<GrDrawContext> dstDrawContext(context->newDrawContext(GrContext::kLoose_BackingFit,
-                                                                    rect.width(), rect.height(),
-                                                                    kSkia8888_GrPixelConfig));
+        GrTexture* scratch = context->textureProvider()->createApproxTexture(desc);
+        if (!scratch) {
+            return nullptr;
+        }
+        sk_sp<GrDrawContext> dstDrawContext(
+                                      context->drawContext(sk_ref_sp(scratch->asRenderTarget())));
         if (!dstDrawContext) {
             return nullptr;
         }
@@ -519,7 +530,7 @@
                               srcRect, dstRect, radius.fHeight, morphType,
                               Gr1DKernelEffect::kY_Direction);
 
-        srcTexture = dstDrawContext->asTexture();
+        srcTexture.reset(scratch);
     }
 
     return SkSpecialImage::MakeFromGpu(SkIRect::MakeWH(rect.width(), rect.height()),