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/samplecode/SampleEmptyPath.cpp b/samplecode/SampleEmptyPath.cpp
index 53e2199..6071f42 100644
--- a/samplecode/SampleEmptyPath.cpp
+++ b/samplecode/SampleEmptyPath.cpp
@@ -1,14 +1,15 @@
-
 /*
  * 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 "SampleCode.h"
 #include "SkView.h"
 #include "SkCanvas.h"
 #include "SkPaint.h"
+#include "SkPath.h"
 #include "SkRandom.h"
 #include "SkString.h"