Remove ownership aruments from render target wrap functions

We never adopt render targets (just borrow them).

BUG=skia:

Change-Id: Ie899b814a7a81339a8735bbd7ad9facc66e580d7
Reviewed-on: https://skia-review.googlesource.com/9525
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
diff --git a/src/gpu/gl/GrGLGpu.cpp b/src/gpu/gl/GrGLGpu.cpp
index 7a811d1..d7af9de 100644
--- a/src/gpu/gl/GrGLGpu.cpp
+++ b/src/gpu/gl/GrGLGpu.cpp
@@ -578,17 +578,12 @@
     return GrGLTexture::MakeWrapped(this, surfDesc, idDesc);
 }
 
-sk_sp<GrRenderTarget> GrGLGpu::onWrapBackendRenderTarget(const GrBackendRenderTargetDesc& wrapDesc,
-                                                         GrWrapOwnership ownership) {
+sk_sp<GrRenderTarget> GrGLGpu::onWrapBackendRenderTarget(const GrBackendRenderTargetDesc& wrapDesc){
     GrGLRenderTarget::IDDesc idDesc;
     idDesc.fRTFBOID = static_cast<GrGLuint>(wrapDesc.fRenderTargetHandle);
     idDesc.fMSColorRenderbufferID = 0;
     idDesc.fTexFBOID = GrGLRenderTarget::kUnresolvableFBOID;
-    if (kAdopt_GrWrapOwnership == ownership) {
-        idDesc.fRTFBOOwnership = GrBackendObjectOwnership::kOwned;
-    } else {
-        idDesc.fRTFBOOwnership = GrBackendObjectOwnership::kBorrowed;
-    }
+    idDesc.fRTFBOOwnership = GrBackendObjectOwnership::kBorrowed;
     idDesc.fIsMixedSampled = false;
 
     GrSurfaceDesc desc;