Count number of origins with data affected by clearing "cookies and site data".

chrome/browser/browsing_data/browsing_data_counter_utils.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 "chrome/browser/browsing_data/browsing_data_counter_utils.h"
 
 #include "base/command_line.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/browsing_data/cache_counter.h"
 #include "chrome/browser/browsing_data/media_licenses_counter.h"
@@ skipping 63 matching lines @@
     if (cache_size_bytes >= kBytesInAMegabyte) {
       base::string16 formatted_size = FormatBytesMBOrHigher(cache_size_bytes);
       return !is_upper_limit
                  ? formatted_size
                  : l10n_util::GetStringFUTF16(
                        IDS_DEL_CACHE_COUNTER_UPPER_ESTIMATE, formatted_size);
     }
     return l10n_util::GetStringUTF16(IDS_DEL_CACHE_COUNTER_ALMOST_EMPTY);
   }
 
+  if (pref_name == browsing_data::prefs::kDeleteCookies) {
+    // Cookie counter.
+    browsing_data::BrowsingDataCounter::ResultInt origin_count =
+        static_cast<const browsing_data::BrowsingDataCounter::FinishedResult*>(
+            result)
+            ->Value();
+    std::ostringstream result;
+    result << origin_count;
+    return base::UTF8ToUTF16(result.str());

[msramek, 2017/01/09 12:54:43]

We should definitely output more than just a number - something like "%d sites"
/ "%d websites" etc. (check what's in the mocks). Please add the new string to
generated_resources.grd.

[dullweber, 2017/01/09 16:05:45]

I added the new string from the discussion document: "42 sites use cookies.
Cookies keep you signed in to your favorite sites.". There are also other
strings in the slides from Max. "For 42 sites" and a two line string that is
probably too long for the current ui.

+  }
+
   if (pref_name == browsing_data::prefs::kDeleteMediaLicenses) {
     const MediaLicensesCounter::MediaLicenseResult* media_license_result =
         static_cast<const MediaLicensesCounter::MediaLicenseResult*>(result);
     if (media_license_result->Value() > 0) {
      return l10n_util::GetStringFUTF16(
           IDS_DEL_MEDIA_LICENSES_COUNTER_SITE_COMMENT,
           base::UTF8ToUTF16(media_license_result->GetOneOrigin()));
     }
     return l10n_util::GetStringUTF16(
         IDS_DEL_MEDIA_LICENSES_COUNTER_GENERAL_COMMENT);
@@ skipping 31 matching lines @@
     return base::ReplaceStringPlaceholders(
         l10n_util::GetPluralStringFUTF16(
             IDS_DEL_HOSTED_APPS_COUNTER, hosted_apps_count),
         replacements,
         nullptr);
   }
 #endif
 
   return browsing_data::GetCounterTextFromResult(result);
 }