make context() virtual on device

src/core/SkCanvas.cpp

 /*
  * Copyright 2008 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkBitmapDevice.h"
 #include "SkCanvas.h"
 #include "SkCanvasPriv.h"
@@ skipping 1845 matching lines @@
 const SkRegion& SkCanvas::internal_private_getTotalClip() const {
     return fMCRec->fRasterClip.forceGetBW();
 }
 
 GrRenderTarget* SkCanvas::internal_private_accessTopLayerRenderTarget() {
     SkBaseDevice* dev = this->getTopDevice();
     return dev ? dev->accessRenderTarget() : nullptr;
 }
 
 GrContext* SkCanvas::getGrContext() {
-#if SK_SUPPORT_GPU
     SkBaseDevice* device = this->getTopDevice();
-    if (device) {
-        GrRenderTarget* renderTarget = device->accessRenderTarget();
-        if (renderTarget) {
-            return renderTarget->getContext();
-        }
-    }
-#endif
-
-    return nullptr;
-
+    return device ? device->context() : nullptr;
 }
 
 void SkCanvas::drawDRRect(const SkRRect& outer, const SkRRect& inner,
                           const SkPaint& paint) {
     TRACE_EVENT0("disabled-by-default-skia", "SkCanvas::drawDRRect()");
     if (outer.isEmpty()) {
         return;
     }
     if (inner.isEmpty()) {
         this->drawRRect(outer, paint);
@@ skipping 1183 matching lines @@
 
 SkAutoCanvasMatrixPaint::~SkAutoCanvasMatrixPaint() {
     fCanvas->restoreToCount(fSaveCount);
 }
 
 #ifdef SK_SUPPORT_LEGACY_NEW_SURFACE_API
 SkSurface* SkCanvas::newSurface(const SkImageInfo& info, const SkSurfaceProps* props) {
     return this->makeSurface(info, props).release();
 }
 #endif