Some cleanup in GrTextureProvider and GrResourceProvider.

Review URL: https://codereview.chromium.org/1261643004
diff --git a/tests/TessellatingPathRendererTests.cpp b/tests/TessellatingPathRendererTests.cpp
index d6d3330..dbfd825 100644
--- a/tests/TessellatingPathRendererTests.cpp
+++ b/tests/TessellatingPathRendererTests.cpp
@@ -261,8 +261,7 @@
     desc.fHeight = 800;
     desc.fConfig = kSkia8888_GrPixelConfig;
     desc.fOrigin = kTopLeft_GrSurfaceOrigin;
-    SkAutoTUnref<GrTexture> texture(context->textureProvider()->refScratchTexture(desc,
-        GrTextureProvider::kExact_ScratchTexMatch));
+    SkAutoTUnref<GrTexture> texture(context->textureProvider()->createApproxTexture(desc));
     GrTestTarget tt;
     context->getTestTarget(&tt);
     GrRenderTarget* rt = texture->asRenderTarget();