IWYU: 'core' target, files starting A-C.

TBR=reed@google.com
Verbal lgtm, does not change API.

Committed: https://skia.googlesource.com/skia/+/7403d87db8e43d4c2b5b25ac22a0ebc22bd09d69

Review URL: https://codereview.chromium.org/1265033002
diff --git a/tests/BlurTest.cpp b/tests/BlurTest.cpp
index 4dad71d..645340a 100644
--- a/tests/BlurTest.cpp
+++ b/tests/BlurTest.cpp
@@ -8,11 +8,12 @@
 #include "SkBlurMask.h"
 #include "SkBlurMaskFilter.h"
 #include "SkBlurDrawLooper.h"
-#include "SkLayerDrawLooper.h"
-#include "SkEmbossMaskFilter.h"
 #include "SkCanvas.h"
+#include "SkEmbossMaskFilter.h"
+#include "SkLayerDrawLooper.h"
 #include "SkMath.h"
 #include "SkPaint.h"
+#include "SkPath.h"
 #include "Test.h"
 
 #if SK_SUPPORT_GPU