Reduce use of SkImage_Base::peekTexture

Change-Id: I079093c9706df4911d47fba04b786e59240e8cb4
Reviewed-on: https://skia-review.googlesource.com/7792
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
diff --git a/src/image/SkImage_Gpu.cpp b/src/image/SkImage_Gpu.cpp
index c425d27..ef25844 100644
--- a/src/image/SkImage_Gpu.cpp
+++ b/src/image/SkImage_Gpu.cpp
@@ -93,8 +93,13 @@
     return true;
 }
 
-sk_sp<GrSurfaceProxy> SkImage_Gpu::refProxy() const {
-    return GrSurfaceProxy::MakeWrapped(fTexture);
+sk_sp<GrTextureProxy> SkImage_Gpu::asTextureProxyRef() const {
+    sk_sp<GrSurfaceProxy> sProxy = GrSurfaceProxy::MakeWrapped(fTexture);
+    if (!sProxy) {
+        return nullptr;
+    }
+
+    return sk_ref_sp(sProxy->asTextureProxy());
 }
 
 GrTexture* SkImage_Gpu::asTextureRef(GrContext* ctx, const GrSamplerParams& params,
@@ -104,7 +109,7 @@
     if (texColorSpace) {
         *texColorSpace = this->fColorSpace;
     }
-    GrTextureAdjuster adjuster(this->peekTexture(), this->alphaType(), this->bounds(),
+    GrTextureAdjuster adjuster(fTexture.get(), this->alphaType(), this->bounds(),
                                this->uniqueID(), this->fColorSpace.get());
     return adjuster.refTextureSafeForParams(params, nullptr, scaleAdjust);
 }