skia: Do not include a source file in another source file.

skia/ext/skia_utils_ios_unittest.mm

Index: skia/ext/skia_utils_ios_unittest.mm
diff --git a/skia/ext/skia_utils_ios_unittest.mm b/skia/ext/skia_utils_ios_unittest.mm
index c26e688291bf3e1977b78eeaba5497abf3a268c0..8d0c9beae1a7456be71431bee49333cbf41fbd4a 100644
--- a/skia/ext/skia_utils_ios_unittest.mm
+++ b/skia/ext/skia_utils_ios_unittest.mm
@@ -2,10 +2,12 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+#include "skia/ext/skia_utils_ios.h"
+
+#import <ImageIO/ImageIO.h>
 #import <UIKit/UIKit.h>
 
 #include "base/base64.h"
-#include "skia/ext/skia_utils_ios.mm"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace {