Implement GetCounterTextFromResult() for the hosted apps counter.

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/string_util.h"
+#include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/browsing_data/autofill_counter.h"
 #include "chrome/browser/browsing_data/cache_counter.h"
 #include "chrome/browser/browsing_data/history_counter.h"
+#include "chrome/browser/browsing_data/hosted_apps_counter.h"
 #include "chrome/browser/browsing_data/passwords_counter.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/pref_names.h"
 #include "chrome/grit/generated_resources.h"
 #include "components/prefs/pref_service.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/base/text/bytes_formatting.h"
 
 bool AreCountersEnabled() {
   if (base::CommandLine::ForCurrentProcess()->HasSwitch(
@@ skipping 130 matching lines @@
         break;
       case 3:
         text = l10n_util::GetStringFUTF16(IDS_DEL_AUTOFILL_COUNTER_THREE_TYPES,
                                           displayed_strings[0],
                                           displayed_strings[1],
                                           displayed_strings[2]);
         break;
       default:
         NOTREACHED();
     }
+
+  } else if (pref_name == prefs::kDeleteHostedAppsData) {
+    // Hosted apps counter.
+    const HostedAppsCounter::HostedAppsResult* hosted_apps_result =
+        static_cast<const HostedAppsCounter::HostedAppsResult*>(result);
+    int hosted_apps_count = hosted_apps_result->Value();
+
+    DCHECK_GE((unsigned int)hosted_apps_result->Value(),

[vabr (Chromium), 2016/06/20 13:51:43]

Please do not use C-style casting. Consider using checked_cast from
base/numerics/safe_conversions.h.

Also, is the second argument of type size_t as opposed to unsigned int?

[msramek, 2016/06/20 14:06:18]

Done. Yeah, I just quickly added this to compile and test the code and forgot
about that :)

+              hosted_apps_result->examples().size());
+
+    std::vector<base::string16> replacements;
+    if (hosted_apps_count > 0) {
+      replacements.push_back(                                     // App1,
+          base::UTF8ToUTF16(hosted_apps_result->examples()[0]));
+    }
+    if (hosted_apps_count > 1) {
+      replacements.push_back(
+          base::UTF8ToUTF16(hosted_apps_result->examples()[1]));  // App2,
+    }
+    if (hosted_apps_count > 2) {
+      replacements.push_back(l10n_util::GetPluralStringFUTF16(  // and X-2 more.
+          IDS_DEL_HOSTED_APPS_COUNTER_AND_X_MORE,
+          hosted_apps_count - 2));
+    }
+
+    // The output string has both the number placeholder (#) and substitution
+    // placeholders ($1, $2, $3). First fetch the correct plural string first,
+    // then substitute the $ placeholders.
+    text = base::ReplaceStringPlaceholders(
+        l10n_util::GetPluralStringFUTF16(
+            IDS_DEL_HOSTED_APPS_COUNTER, hosted_apps_count),
+        replacements,
+        nullptr);
   }
 
   return text;
 }
 
 bool GetDeletionPreferenceFromDataType(
     BrowsingDataType data_type, std::string* out_pref) {
   switch (data_type) {
     case HISTORY:
       *out_pref = prefs::kDeleteBrowsingHistory;
@@ skipping 31 matching lines @@
     return new HistoryCounter();
   if (pref_name == prefs::kDeleteCache)
     return new CacheCounter();
   if (pref_name == prefs::kDeletePasswords)
     return new PasswordsCounter();
   if (pref_name == prefs::kDeleteFormData)
     return new AutofillCounter();
 
   return nullptr;
 }