update SkRasterPipeline::run() to also take y

y isn't used yet.  This is just a warmup that updates the callers.

Change-Id: I78f4f44e2b82f72b3a39fa8a8bdadef1d1b8a99e
Reviewed-on: https://skia-review.googlesource.com/18381
Reviewed-by: Mike Klein <mtklein@chromium.org>
Commit-Queue: Mike Klein <mtklein@chromium.org>
diff --git a/src/codec/SkWebpCodec.cpp b/src/codec/SkWebpCodec.cpp
index 829ebb8..700178a 100644
--- a/src/codec/SkWebpCodec.cpp
+++ b/src/codec/SkWebpCodec.cpp
@@ -377,7 +377,7 @@
     }
     p.append(store_dst, dst);
 
-    p.run(0, width);
+    p.run(0,0, width);
 }
 
 SkCodec::Result SkWebpCodec::onGetPixels(const SkImageInfo& dstInfo, void* dst, size_t rowBytes,