Move each permission classes to its own files in extensions/permissions

chrome/common/extensions/permissions/permission_message.cc

+// Copyright (c) 2012 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/common/extensions/permissions/permission_message.h"
+
+#include "base/string_number_conversions.h"
+#include "base/utf_string_conversions.h"
+#include "grit/generated_resources.h"
+#include "ui/base/l10n/l10n_util.h"
+
+namespace extensions {
+//
+// PermissionMessage
+//
+
+// static
+PermissionMessage PermissionMessage::CreateFromHostList(
+    const std::set<std::string>& hosts) {
+  std::vector<std::string> host_list(hosts.begin(), hosts.end());
+  DCHECK_GT(host_list.size(), 0UL);
+  ID message_id;
+  string16 message;
+
+  switch (host_list.size()) {
+    case 1:
+      message_id = kHosts1;
+      message = l10n_util::GetStringFUTF16(IDS_EXTENSION_PROMPT_WARNING_1_HOST,
+                                           UTF8ToUTF16(host_list[0]));
+      break;
+    case 2:
+      message_id = kHosts2;
+      message = l10n_util::GetStringFUTF16(IDS_EXTENSION_PROMPT_WARNING_2_HOSTS,
+                                           UTF8ToUTF16(host_list[0]),
+                                           UTF8ToUTF16(host_list[1]));
+      break;
+    case 3:
+      message_id = kHosts3;
+      message = l10n_util::GetStringFUTF16(IDS_EXTENSION_PROMPT_WARNING_3_HOSTS,
+                                           UTF8ToUTF16(host_list[0]),
+                                           UTF8ToUTF16(host_list[1]),
+                                           UTF8ToUTF16(host_list[2]));
+      break;
+    default:
+      message_id = kHosts4OrMore;
+      message = l10n_util::GetStringFUTF16(
+          IDS_EXTENSION_PROMPT_WARNING_4_OR_MORE_HOSTS,
+          UTF8ToUTF16(host_list[0]),
+          UTF8ToUTF16(host_list[1]),
+          base::IntToString16(hosts.size() - 2));
+      break;
+  }
+
+  return PermissionMessage(message_id, message);
+}
+
+PermissionMessage::PermissionMessage(
+    PermissionMessage::ID id, const string16& message)
+  : id_(id), message_(message) {
+}
+
+PermissionMessage::~PermissionMessage() {}
+
+}  // namespace extensions