Remove params from Cacherator_GrTextureMaker

Review URL: https://codereview.chromium.org/1403313003
diff --git a/src/utils/SkImageGeneratorUtils.cpp b/src/utils/SkImageGeneratorUtils.cpp
index 8202dbe..928d052 100644
--- a/src/utils/SkImageGeneratorUtils.cpp
+++ b/src/utils/SkImageGeneratorUtils.cpp
@@ -56,8 +56,7 @@
     {}
 
 protected:
-    GrTexture* onGenerateTexture(GrContext* ctx, const GrTextureParams&,
-                                 const SkIRect* subset) override {
+    GrTexture* onGenerateTexture(GrContext* ctx, const SkIRect* subset) override {
         if (ctx) {
             SkASSERT(ctx == fCtx.get());
         }
@@ -113,8 +112,7 @@
         return fImage->readPixels(info, pixels, rowBytes, 0, 0);
     }
 
-    GrTexture* onGenerateTexture(GrContext* ctx, const GrTextureParams&,
-                                 const SkIRect* subset) override {
+    GrTexture* onGenerateTexture(GrContext* ctx, const SkIRect* subset) override {
         // waiting on https://code.google.com/p/skia/issues/detail?id=4233
         return nullptr;
     }