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

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

Review URL: https://codereview.chromium.org/1265033002
diff --git a/bench/PathIterBench.cpp b/bench/PathIterBench.cpp
index bbc3c03..2da2594 100644
--- a/bench/PathIterBench.cpp
+++ b/bench/PathIterBench.cpp
@@ -10,6 +10,7 @@
 #include "SkCanvas.h"
 #include "SkColorPriv.h"
 #include "SkPaint.h"
+#include "SkPath.h"
 #include "SkRandom.h"
 #include "SkShader.h"
 #include "SkString.h"