Rationalize GrContext's Gr*Proxy getter naming

This CL replaces the entry points:

asDeferredSurface
asDeferredTexture
asDeferredRenderTarget

with:

GrSurfaceProxy* asSurfaceProxy
sk_sp<GrSurfaceProxy> asSurfaceProxyRef

GrTextureProxy* asTextureProxy
sk_sp<GrTextureProxy> asTextureProxyRef

GrRenderTargetProxy* asRenderTargetProxy
sk_sp<GrRenderTargetProxy> asRenderTargetProxyRef

Change-Id: I7c2b1ea3d702023ff23019815ca13c9ff6f3b32d
Reviewed-on: https://skia-review.googlesource.com/7741
Commit-Queue: Robert Phillips <robertphillips@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>
diff --git a/src/gpu/GrYUVProvider.cpp b/src/gpu/GrYUVProvider.cpp
index ade72a6..ee2ad63 100644
--- a/src/gpu/GrYUVProvider.cpp
+++ b/src/gpu/GrYUVProvider.cpp
@@ -133,9 +133,9 @@
     GrPaint paint;
     sk_sp<GrFragmentProcessor> yuvToRgbProcessor(
         GrYUVEffect::MakeYUVToRGB(ctx,
-                                  sk_ref_sp(yuvTextureContexts[0]->asDeferredTexture()),
-                                  sk_ref_sp(yuvTextureContexts[1]->asDeferredTexture()),
-                                  sk_ref_sp(yuvTextureContexts[2]->asDeferredTexture()),
+                                  yuvTextureContexts[0]->asTextureProxyRef(),
+                                  yuvTextureContexts[1]->asTextureProxyRef(),
+                                  yuvTextureContexts[2]->asTextureProxyRef(),
                                   yuvInfo.fSizeInfo.fSizes, yuvInfo.fColorSpace, false));
     paint.addColorFragmentProcessor(std::move(yuvToRgbProcessor));