Revert of Refactor drawContext/RenderTarget creation

src/core/SkImageFilter.cpp

Index: src/core/SkImageFilter.cpp
diff --git a/src/core/SkImageFilter.cpp b/src/core/SkImageFilter.cpp
index d0042527e48c29381c0a93fc94e1d98981d5fe31..ed6d14ac147b7464814f18188168c689712faf90 100644
--- a/src/core/SkImageFilter.cpp
+++ b/src/core/SkImageFilter.cpp
@@ -280,9 +280,18 @@
     paint.addColorFragmentProcessor(fp.get());
     paint.setPorterDuffXPFactory(SkXfermode::kSrc_Mode);
 
-    sk_sp<GrDrawContext> drawContext(context->newDrawContext(GrContext::kLoose_BackingFit,
-                                                             bounds.width(), bounds.height(),
-                                                             kRGBA_8888_GrPixelConfig));
+    GrSurfaceDesc desc;
+    desc.fFlags = kRenderTarget_GrSurfaceFlag;
+    desc.fWidth = bounds.width();
+    desc.fHeight = bounds.height();
+    desc.fConfig = kRGBA_8888_GrPixelConfig;
+
+    sk_sp<GrTexture> dst(context->textureProvider()->createApproxTexture(desc));
+    if (!dst) {
+        return nullptr;
+    }
+
+    sk_sp<GrDrawContext> drawContext(context->drawContext(sk_ref_sp(dst->asRenderTarget())));
     if (!drawContext) {
         return nullptr;
     }
@@ -294,7 +303,7 @@
 
     return SkSpecialImage::MakeFromGpu(SkIRect::MakeWH(bounds.width(), bounds.height()),
                                        kNeedNewImageUniqueID_SpecialImage,
-                                       drawContext->asTexture());
+                                       std::move(dst));
 }
 #endif