IWYU -- SkShader.h

Bug: skia:
Change-Id: I57bffc14c4888627a22158e35f3ac3b762138f02
Reviewed-on: https://skia-review.googlesource.com/98520
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Mike Reed <reed@google.com>
diff --git a/bench/GameBench.cpp b/bench/GameBench.cpp
index dfd0aa1..ae0cb7e 100644
--- a/bench/GameBench.cpp
+++ b/bench/GameBench.cpp
@@ -6,6 +6,7 @@
  */
 
 #include "Benchmark.h"
+#include "SkBitmap.h"
 #include "SkCanvas.h"
 #include "SkPaint.h"
 #include "SkRandom.h"