Stop testing SkImageDecoder in DM/nanobench

bench/DecodingBench.h

Index: bench/DecodingBench.h
diff --git a/bench/DecodingBench.h b/bench/DecodingBench.h
deleted file mode 100644
index 196749dfba59dc3b661ee435cdbb2fd690eb9074..0000000000000000000000000000000000000000
--- a/bench/DecodingBench.h
+++ /dev/null
@@ -1,40 +0,0 @@
-/*
- * Copyright 2015 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#ifndef DecodingBench_DEFINED
-#define DecodingBench_DEFINED
-
-#include "Benchmark.h"
-#include "SkData.h"
-#include "SkImageDecoder.h"
-#include "SkRefCnt.h"
-#include "SkString.h"
-
-/*
- *
- * This benchmark is designed to test the performance of image decoding.
- * It is invoked from the nanobench.cpp file.
- *
- */
-class DecodingBench : public Benchmark {
-public:
-    DecodingBench(SkString path, SkColorType colorType);
-
-protected:
-    const char* onGetName() override;
-    bool isSuitableFor(Backend backend) override;
-    void onDraw(int n, SkCanvas* canvas) override;
-    void onDelayedSetup() override;
-
-private:
-    SkString                fName;
-    SkColorType             fColorType;
-    SkAutoTUnref<SkData>    fData;
-    SkAutoMalloc            fPixelStorage;
-    typedef Benchmark INHERITED;
-};
-#endif // DecodingBench_DEFINED