Enables the user to select multiple languages for spellchecking (UI)

chrome/common/spellcheck_common.h

Index: chrome/common/spellcheck_common.h
diff --git a/chrome/common/spellcheck_common.h b/chrome/common/spellcheck_common.h
index cbdaf7bf08906ff3c5545f2dc84d9c773d37027f..075b35bbece9cd814c63917dd78e764fa6fe9972 100644
--- a/chrome/common/spellcheck_common.h
+++ b/chrome/common/spellcheck_common.h
@@ -12,6 +12,8 @@ namespace base {
 class FilePath;
 }
 
+class PrefService;
+
 namespace chrome {
 namespace spellcheck_common {
 
@@ -39,6 +41,9 @@ static const size_t MAX_SYNCABLE_DICTIONARY_WORDS = 1300;
 // dictionary.
 static const size_t MAX_CUSTOM_DICTIONARY_WORD_BYTES = 99;
 
+// Character that separates language codes saved in preferences.
+static const char kDictionaryLanguagesSeparator = ',';
+
 base::FilePath GetVersionedFileName(const std::string& input_language,
                                     const base::FilePath& dict_dir);
 
@@ -55,6 +60,13 @@ void GetISOLanguageCountryCodeFromLocale(const std::string& locale,
                                          std::string* language_code,
                                          std::string* country_code);
 
+// Reads the spellcheck.dictionary or spellcheck.dictionaries preference

[please use gerrit instead, 2015/06/05 17:50:06]

No need to specify so much implementation details, especially since
"spellcheck.dictionary" preference will eventually go away.

// Returns the list of enabled spellcheck dictionaries.

[Julius, 2015/06/05 21:38:33]

Done.

+// (depending on whether the enable-multilingual-spellchecker flag is set), and
+// returns the language codes.
+std::vector<std::string> GetDictionaryLanguagesPref(PrefService* prefs);
+
+// Checks if the command-line switch enable-multilingual-spellchecker is set.

[please use gerrit instead, 2015/06/05 17:50:06]

This comment will soon grow stale, because command-line will be only one of
several ways to enable multilingual spellchecker.

// Returns true if multilingual spellchecker is enabled.

[Julius, 2015/06/05 21:38:33]

Done.

+bool MultilingualSpellcheckIsEnabled();

[please use gerrit instead, 2015/06/05 17:50:06]

Newline after.

[Julius, 2015/06/05 21:38:33]

Done.

 }  // namespace spellcheck_common
 }  // namespace chrome