Remove uses of unnamed namespace in bench/ directory.

bench/MorphologyBench.cpp

Index: bench/MorphologyBench.cpp
diff --git a/bench/MorphologyBench.cpp b/bench/MorphologyBench.cpp
index d042e6d3e64e54e8b5d14036ccfa6502fea64521..c670eb2d9f6af4d37d6d4ba22cf616a6cf6a7a31 100644
--- a/bench/MorphologyBench.cpp
+++ b/bench/MorphologyBench.cpp
@@ -4,6 +4,7 @@
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
+
 #include "SkBenchmark.h"
 #include "SkCanvas.h"
 #include "SkPaint.h"
@@ -16,15 +17,11 @@
 #define REAL    SkFloatToScalar(1.5f)
 #define BIG     SkIntToScalar(10)
 
-namespace {
-
 enum MorphologyType {
     kErode_MT,
     kDilate_MT
 };
 
-}
-
 static const char* gStyleName[] = {
     "erode",
     "dilate"