Add desired width & height to drawContext (as opposed to using the width & height of the RT)

src/gpu/GrRenderTarget.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #include "GrRenderTarget.h"
 
@@ skipping 11 matching lines @@
     SkSafeUnref(fLastDrawTarget);
 }
 
 void GrRenderTarget::discard() {
     // go through context so that all necessary flushing occurs
     GrContext* context = this->getContext();
     if (!context) {
         return;
     }
 
-    sk_sp<GrDrawContext> drawContext(context->drawContext(sk_ref_sp(this)));
+    sk_sp<GrDrawContext> drawContext(context->drawContext(this->width(), this->height(),
+                                                          sk_ref_sp(this)));
     if (!drawContext) {
         return;
     }
 
     drawContext->discard();
 }
 
 void GrRenderTarget::flagAsNeedingResolve(const SkIRect* rect) {
     if (kCanResolve_ResolveType == getResolveType()) {
         if (rect) {
@@ skipping 71 matching lines @@
     return fRenderTarget->getGpu()->getMultisampleSpecs(fRenderTarget, stencil);
 }
 
 GrRenderTarget::SampleConfig GrRenderTarget::ComputeSampleConfig(const GrCaps& caps,
                                                                  int sampleCnt) {
     return (caps.usesMixedSamples() && sampleCnt > 0)
                         ? GrRenderTarget::kStencil_SampleConfig
                         : GrRenderTarget::kUnified_SampleConfig;
 }