Omnibox - Reduce Clipboard URL Suggestions to 1 Hour

components/open_from_clipboard/clipboard_recent_content.cc

 // 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.
 
 #include "components/open_from_clipboard/clipboard_recent_content.h"
 
+#include "base/strings/string_number_conversions.h"
+#include "base/time/time.h"
+#include "components/variations/variations_associated_data.h"
 #include "url/url_constants.h"
 
 namespace {
 ClipboardRecentContent* g_clipboard_recent_content = nullptr;
 
 // Schemes appropriate for suggestion by ClipboardRecentContent.
 const char* kAuthorizedSchemes[] = {
     url::kAboutScheme, url::kDataScheme, url::kHttpScheme, url::kHttpsScheme,
     // TODO(mpearson): add support for chrome:// URLs.  Right now the scheme
     // for that lives in content and is accessible via
@@ skipping 24 matching lines @@
 bool ClipboardRecentContent::IsAppropriateSuggestion(const GURL& url) {
   // Check to make sure it's a scheme we're willing to suggest.
   for (const auto* authorized_scheme : kAuthorizedSchemes) {
     if (url.SchemeIs(authorized_scheme))
       return true;
   }
 
   // Not a scheme we're allowed to return.
   return false;
 }
+
+// static
+base::TimeDelta ClipboardRecentContent::MaximumAgeOfClipboard() {
+  // Identify the current setting for this parameter from the omnibox field
+  // trial.
+  std::string value_str = variations::GetVariationParamValue(
+      "OmniboxBundledExperimentV1", "ClipboardURLMaximumAge");
+  // If the parameter is not set, use a 1 hour timeout.
+  if (value_str.empty())
+    return base::TimeDelta::FromHours(1);
+  // This is a best-effort conversion; we trust the hand-crafted parameters
+  // downloaded from the server to be perfect.  There's no need for handle
+  // errors smartly.
+  int value;
+  // The value in the parameter is stored in seconds.
+  base::StringToInt(value_str, &value);
+  return base::TimeDelta::FromSeconds(value);
+}