Omnibox - Reduce Clipboard URL Suggestions to 1 Hour

components/open_from_clipboard/clipboard_recent_content_impl_ios.mm

 // Copyright 2017 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.
 
 #import "components/open_from_clipboard/clipboard_recent_content_impl_ios.h"
 
 #import <CommonCrypto/CommonDigest.h>
 #import <UIKit/UIKit.h>
 
 #import "base/mac/foundation_util.h"
@@ skipping 132 matching lines @@
     return changeCountChanged;
   }
 
   BOOL md5Changed =
       ![[self getCurrentMD5] isEqualToData:self.lastPasteboardEntryMD5];
   return md5Changed;
 }
 
 - (NSURL*)recentURLFromClipboard {
   [self updateIfNeeded];
-  if ([self clipboardContentAge] > kMaximumAgeOfClipboard) {
+  if ([self clipboardContentAge] > MaximumAgeOfClipboard()) {
     return nil;
   }
   return [self URLFromPasteboard];
 }
 
 - (NSTimeInterval)clipboardContentAge {
   return -[self.lastPasteboardChangeDate timeIntervalSinceNow];
 }
 
 - (void)suppressClipboardContent {
@@ skipping 44 matching lines @@
                               forKey:kPasteboardChangeDateKey];
   [self.sharedUserDefaults setObject:self.lastPasteboardEntryMD5
                               forKey:kPasteboardEntryMD5Key];
 }
 
 - (NSTimeInterval)uptime {
   return base::SysInfo::Uptime().InSecondsF();
 }
 
 @end