Remove image usage type enum. Use GrTextureParams instead.

src/core/SkImageGenerator.cpp

Index: src/core/SkImageGenerator.cpp
diff --git a/src/core/SkImageGenerator.cpp b/src/core/SkImageGenerator.cpp
index 187b46047af7e403feb2577940d15f0ea83a286f..98a40148f272f218fcd04003c55373a6d3b28cea 100644
--- a/src/core/SkImageGenerator.cpp
+++ b/src/core/SkImageGenerator.cpp
@@ -104,12 +104,12 @@ bool SkImageGenerator::onGetYUV8Planes(SkISize sizes[3], void* planes[3], size_t
     return this->onGetYUV8Planes(sizes, planes, rowBytes);
 }
 
-GrTexture* SkImageGenerator::generateTexture(GrContext* ctx, SkImageUsageType usage,
+GrTexture* SkImageGenerator::generateTexture(GrContext* ctx, const GrTextureParams& params,
                                              const SkIRect* subset) {
     if (subset && !SkIRect::MakeWH(fInfo.width(), fInfo.height()).contains(*subset)) {
         return nullptr;
     }
-    return this->onGenerateTexture(ctx, usage, subset);
+    return this->onGenerateTexture(ctx, params, subset);
 }
 
 /////////////////////////////////////////////////////////////////////////////////////////////