Factor out code to set up editing-related context menu items to a static function.

third_party/WebKit/Source/web/ContextMenuClientImpl.h

Index: third_party/WebKit/Source/web/ContextMenuClientImpl.h
diff --git a/third_party/WebKit/Source/web/ContextMenuClientImpl.h b/third_party/WebKit/Source/web/ContextMenuClientImpl.h
index 63c87cdc30b080e20b08b2280bfee6cef8494a08..f69612fd7ab112ad43d58e78d7374a5e8b8c9b79 100644
--- a/third_party/WebKit/Source/web/ContextMenuClientImpl.h
+++ b/third_party/WebKit/Source/web/ContextMenuClientImpl.h
@@ -35,6 +35,8 @@
 
 namespace blink {
 
+class Document;
+class Editor;
 class WebViewImpl;
 struct WebContextMenuData;
 
@@ -47,6 +49,7 @@ class ContextMenuClientImpl final : public ContextMenuClient {
 
  private:
   void PopulateCustomMenuItems(const ContextMenu*, WebContextMenuData*);
+  static int ComputeEditFlags(Document&, Editor&);
   bool ShouldShowContextMenuFromTouch(const blink::WebContextMenuData&);
   WebViewImpl* web_view_;
 };