diff -up chromium-65.0.3325.146/third_party/WebKit/Source/platform/graphics/gpu/SharedGpuContext.h.gcc7 chromium-65.0.3325.146/third_party/WebKit/Source/platform/graphics/gpu/SharedGpuContext.h
--- chromium-65.0.3325.146/third_party/WebKit/Source/platform/graphics/gpu/SharedGpuContext.h.gcc7	2018-03-07 10:34:48.783900894 -0500
+++ chromium-65.0.3325.146/third_party/WebKit/Source/platform/graphics/gpu/SharedGpuContext.h	2018-03-07 10:35:44.885638503 -0500
@@ -5,6 +5,7 @@
 #ifndef SharedGpuContext_h
 #define SharedGpuContext_h
 
+#include <functional>
 #include <memory>
 #include "base/callback.h"
 #include "base/memory/weak_ptr.h"