Add a preference to clear Flash LSO data in the Clear Browsing Data dialog.

chrome/common/pref_names.cc

Index: chrome/common/pref_names.cc
diff --git a/chrome/common/pref_names.cc b/chrome/common/pref_names.cc
index 4799a7f54f40a8c2e6dca46e24b28e7d1973dea3..3e84d5388f74848fb1969e118de585600dd3298a 100644
--- a/chrome/common/pref_names.cc
+++ b/chrome/common/pref_names.cc
@@ -442,8 +442,12 @@ const char kDeleteCache[] = "browser.clear_data.cache";
 const char kDeleteCookies[] = "browser.clear_data.cookies";
 const char kDeletePasswords[] = "browser.clear_data.passwords";
 const char kDeleteFormData[] = "browser.clear_data.form_data";
+const char kDeleteLSOData[] = "browser.clear_data.lso_data";
 const char kDeleteTimePeriod[] = "browser.clear_data.time_period";
 
+// Whether there is a Flash version installed that supports clearing LSO data.
+const char kClearPluginLSODataEnabled[] = "browser.clear_lso_data_enabled";
+
 // Boolean pref to define the default values for using spellchecker.
 const char kEnableSpellCheck[] = "browser.enable_spellchecking";