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/bench/PathBench.cpp b/bench/PathBench.cpp
index ffec90b..f2e84c2 100644
--- a/bench/PathBench.cpp
+++ b/bench/PathBench.cpp
@@ -1,15 +1,16 @@
-
 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
+
 #include "Benchmark.h"
 #include "SkBitmap.h"
 #include "SkCanvas.h"
 #include "SkColorPriv.h"
 #include "SkPaint.h"
+#include "SkPath.h"
 #include "SkRandom.h"
 #include "SkShader.h"
 #include "SkString.h"