Remove params from Cacherator_GrTextureMaker

Review URL: https://codereview.chromium.org/1403313003
diff --git a/gm/image_pict.cpp b/gm/image_pict.cpp
index 7259009..a62ffa0 100644
--- a/gm/image_pict.cpp
+++ b/gm/image_pict.cpp
@@ -220,8 +220,7 @@
         fTexture.reset(SkRef(image->getTexture()));
     }
 protected:
-    GrTexture* onGenerateTexture(GrContext* ctx, const GrTextureParams& params,
-                                 const SkIRect* subset) override {
+    GrTexture* onGenerateTexture(GrContext* ctx, const SkIRect* subset) override {
         if (ctx) {
             SkASSERT(ctx == fCtx.get());
         }