Add wrapBackendTextureAsRenderTarget API

src/gpu/GrTextureProvider.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 "GrTextureProvider.h"
 #include "GrTexturePriv.h"
 #include "GrResourceCache.h"
@@ skipping 120 matching lines @@
     }
     return fGpu->wrapBackendTexture(desc, ownership);
 }
 
 GrRenderTarget* GrTextureProvider::wrapBackendRenderTarget(const GrBackendRenderTargetDesc& desc) {
     ASSERT_SINGLE_OWNER
     return this->isAbandoned() ? nullptr : fGpu->wrapBackendRenderTarget(desc,
                                                                          kBorrow_GrWrapOwnership);
 }
 
+GrRenderTarget* GrTextureProvider::wrapBackendTextureAsRenderTarget(const GrBackendTextureDesc& desc,
+                                                                    GrWrapOwnership ownership) {
+    ASSERT_SINGLE_OWNER
+    if (this->isAbandoned()) {
+      return nullptr;
+    }
+    return fGpu->wrapBackendTextureAsRenderTarget(desc, ownership);
+}
+
 void GrTextureProvider::assignUniqueKeyToResource(const GrUniqueKey& key, GrGpuResource* resource) {
     ASSERT_SINGLE_OWNER
     if (this->isAbandoned() || !resource) {
         return;
     }
     resource->resourcePriv().setUniqueKey(key);
 }
 
 bool GrTextureProvider::existsResourceWithUniqueKey(const GrUniqueKey& key) const {
     ASSERT_SINGLE_OWNER
     return this->isAbandoned() ? false : fCache->hasUniqueKey(key);
 }
 
 GrGpuResource* GrTextureProvider::findAndRefResourceByUniqueKey(const GrUniqueKey& key) {
     ASSERT_SINGLE_OWNER
     return this->isAbandoned() ? nullptr : fCache->findAndRefUniqueResource(key);
 }
 
 GrTexture* GrTextureProvider::findAndRefTextureByUniqueKey(const GrUniqueKey& key) {
     ASSERT_SINGLE_OWNER
     GrGpuResource* resource = this->findAndRefResourceByUniqueKey(key);
     if (resource) {
         GrTexture* texture = static_cast<GrSurface*>(resource)->asTexture();
         SkASSERT(texture);
         return texture;
     }
     return NULL;
 }