Add hash to OFC pasteboard change detection

components/open_from_clipboard/clipboard_recent_content.h

Index: components/open_from_clipboard/clipboard_recent_content.h
diff --git a/components/open_from_clipboard/clipboard_recent_content.h b/components/open_from_clipboard/clipboard_recent_content.h
index c8f2499e363edae56d689f9138789569db4e3f3b..2aee470615d456028cae9572df04f1f10d86e14f 100644
--- a/components/open_from_clipboard/clipboard_recent_content.h
+++ b/components/open_from_clipboard/clipboard_recent_content.h
@@ -33,6 +33,9 @@ class ClipboardRecentContent {
   // be null.
   virtual bool GetRecentURLFromClipboard(GURL* url) const = 0;
 
+  // Reports that the URL contained in the pasteboard was displayed.
+  virtual void RecentURLDisplayed() = 0;
+
   // Returns how old the content of the clipboard is.
   virtual base::TimeDelta GetClipboardContentAge() const = 0;