[iwyu] Add missing include in graph-visualizer.h

R=titzer@chromium.org

Bug: v8:7754, v8:7965
Change-Id: Ie7eb8243186238e71e8c51d133d2c334f946727f
Reviewed-on: https://chromium-review.googlesource.com/1160223Reviewed-by: Ben Titzer <titzer@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#54860}

src/compiler/graph-visualizer.h

@@ -11,6 +11,7 @@
 #include <memory>
 
 #include "src/globals.h"
+#include "src/handles.h"
 
 namespace v8 {
 namespace internal {

tools/generate-header-include-checks.py

@@ -34,7 +34,6 @@ AUTO_EXCLUDE = [
   'src/builtins/builtins-constructor.h',
   'src/builtins/builtins-utils.h',
   'src/compiler/allocation-builder.h',
-  'src/compiler/graph-visualizer.h',
   'src/compiler/js-context-specialization.h',
   'src/compiler/raw-machine-assembler.h',
   'src/dateparser-inl.h',