Add wrapBackendTextureAsRenderTarget API

src/gpu/GrResourceProvider.cpp

Index: src/gpu/GrResourceProvider.cpp
diff --git a/src/gpu/GrResourceProvider.cpp b/src/gpu/GrResourceProvider.cpp
index 19fa1cfbb69c62f5fc29ae02f4378946239d6dbd..79146d09113c37170a75bd9e025b0fc76b193970 100644
--- a/src/gpu/GrResourceProvider.cpp
+++ b/src/gpu/GrResourceProvider.cpp
@@ -227,4 +227,11 @@ GrStencilAttachment* GrResourceProvider::attachStencilAttachment(GrRenderTarget*
     return rt->renderTargetPriv().getStencilAttachment();
 }
 
+GrRenderTarget* GrResourceProvider::wrapBackendTextureAsRenderTarget(
+        const GrBackendTextureDesc& desc, GrWrapOwnership ownership) {
+    if (this->isAbandoned()) {
+        return nullptr;
+    }
+    return this->gpu()->wrapBackendTextureAsRenderTarget(desc, ownership);
+}