Allow installer::GetLocalizedString to return mode-specific strings.

chrome/installer/util/l10n_string_util.h

Index: chrome/installer/util/l10n_string_util.h
diff --git a/chrome/installer/util/l10n_string_util.h b/chrome/installer/util/l10n_string_util.h
index 836d61e6d55e0916bd4ab68cf9ebf25b74ffe2e0..9c8acdbcd446bf7b25ac3ea84275db1d53e80d92 100644
--- a/chrome/installer/util/l10n_string_util.h
+++ b/chrome/installer/util/l10n_string_util.h
@@ -31,9 +31,13 @@ class TranslationDelegate {
 void SetTranslationDelegate(TranslationDelegate* delegate);
 
 // Given a string base id, return the localized version of the string based on
-// the system language.  This is used for shortcuts placed on the user's
-// desktop.  The string is retrieved from the TranslationDelegate if one has
-// been set.  Otherwise, the string is read from the binary's string table.
+// the system language. This is used for shortcuts placed on the user's desktop.
+// The string is retrieved from the TranslationDelegate if one has been set.
+// Otherwise, the string is read from the binary's string table. Certain
+// messages (see MODE_SPECIFIC_STRINGS in create_string_rc.py) are dynamically
+// mapped to a variant that is specific to the current install mode (e.g.,
+// IDS_INBOUND_MDNS_RULE_NAME is mapped to IDS_INBOUND_MDNS_RULE_NAME_CANARY for
+// canary Chrome).
 std::wstring GetLocalizedString(int base_message_id);
 
 // Returns the localized version of a string (obtained from GetLocalizedString)
@@ -48,6 +52,11 @@ std::wstring GetLocalizedEulaResource();
 // Returns the language identifier of the translation currently in use.
 std::wstring GetCurrentTranslation();
 
+// Returns the mode-specific message id for |base_message_id| given the current
+// install mode. Returns |base_message_id| itself if it does not have per-mode
+// variants. See MODE_SPECIFIC_STRINGS in create_string_rc.py for details..
+int GetBaseMessageIdForMode(int base_message_id);
+
 }  // namespace installer.
 
 #endif  // CHROME_INSTALLER_UTIL_L10N_STRING_UTIL_H_