Cleanup: Sanitize the order of includes under tests/

Initially this was to make sure Test.h appeared after the Sk*.h includes.

Patch generated by the following command line:

$ ~/chromium/src/tools/sort-headers.py tests/*.cpp

BUG=None
TEST=tests
R=robertphillips@google.com

Review URL: https://codereview.chromium.org/145313004

git-svn-id: http://skia.googlecode.com/svn/trunk@13177 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/tests/CachedDecodingPixelRefTest.cpp b/tests/CachedDecodingPixelRefTest.cpp
index d725ff5..a04ebe6 100644
--- a/tests/CachedDecodingPixelRefTest.cpp
+++ b/tests/CachedDecodingPixelRefTest.cpp
@@ -6,12 +6,12 @@
  */
 
 #include "SkBitmap.h"
+#include "SkCachingPixelRef.h"
 #include "SkCanvas.h"
 #include "SkData.h"
 #include "SkDecodingImageGenerator.h"
 #include "SkDiscardableMemoryPool.h"
 #include "SkImageDecoder.h"
-#include "SkCachingPixelRef.h"
 #include "SkScaledImageCache.h"
 #include "SkStream.h"
 #include "SkUtils.h"