Fix detection of clipboard change after device restart.

components/open_from_clipboard/clipboard_recent_content_ios.h

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef COMPONENTS_OPEN_FROM_CLIPBOARD_CLIPBOARD_RECENT_CONTENT_IOS_H_
 #define COMPONENTS_OPEN_FROM_CLIPBOARD_CLIPBOARD_RECENT_CONTENT_IOS_H_
 
 #include "base/mac/scoped_nsobject.h"
 #include "components/open_from_clipboard/clipboard_recent_content.h"
 #include "url/gurl.h"
@@ skipping 12 matching lines @@
   void PasteboardChanged();
 
   // ClipboardRecentContent implementation.
   bool GetRecentURLFromClipboard(GURL* url) const override;
 
  private:
   friend struct DefaultSingletonTraits<ClipboardRecentContentIOS>;
 
   ClipboardRecentContentIOS();
   ~ClipboardRecentContentIOS() override;
-  // Loads information from the user defaults about the latest clipboard entry.
+  // Loads information from the user defaults about the latest pasteboard entry.
   void LoadFromUserDefaults();
-  // Saves information to the user defaults about the latest clipboard entry.
+  // Saves information to the user defaults about the latest pasteboard entry.
   void SaveToUserDefaults();
   // Returns the URL contained in the clipboard (if any).
   GURL URLFromPasteboard();
+  // Returns whether the device has restarted since the last time a pasteboard
+  // change was detected.
+  bool DeviceRestartedSincePasteboardChanged();
 
   // The pasteboard's change count. Increases everytime the pasteboard changes.
   NSInteger lastPasteboardChangeCount_;
   // Estimation of the date when the pasteboard changed.
   base::scoped_nsobject<NSDate> lastPasteboardChangeDate_;
   // Cache of the GURL contained in the pasteboard (if any).
   GURL urlFromPasteboardCache_;
   // Bridge to receive notification when the pasteboard changes.
   base::scoped_nsobject<PasteboardNotificationListenerBridge>
       notificationBridge_;
 
   DISALLOW_COPY_AND_ASSIGN(ClipboardRecentContentIOS);
 };
 
 #endif  // COMPONENTS_OPEN_FROM_CLIPBOARD_CLIPBOARD_RECENT_CONTENT_IOS_H_