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/samplecode/SampleShaderText.cpp b/samplecode/SampleShaderText.cpp
index 9fdae84..cf7cf96 100644
--- a/samplecode/SampleShaderText.cpp
+++ b/samplecode/SampleShaderText.cpp
@@ -6,9 +6,10 @@
  */
 
 #include "SampleCode.h"
-#include "SkView.h"
 #include "SkCanvas.h"
 #include "SkGradientShader.h"
+#include "SkPath.h"
+#include "SkView.h"
 
 static void makebm(SkBitmap* bm, int w, int h) {
     bm->allocN32Pixels(w, h);