Warn by default when certain DLL conflicts exist on XP.

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 97c7f1994530c9b6671ee6ce105c82c2c55e3d47..85a6d2122bf831c1ddf63d0da0a3445096a39ddb 100644
--- a/chrome/common/pref_names.cc
+++ b/chrome/common/pref_names.cc
@@ -2475,6 +2475,9 @@ extern const char kLastAppListLaunchPing[] = "app_list.last_launch_ping";
 extern const char kAppListAppLaunchCount[] = "app_list.app_launch_count";
 extern const char kLastAppListAppLaunchPing[] = "app_list.last_app_launch_ping";
 
+// How often the bubble has been shown.
+extern const char kModuleConflictBubbleShown[] = "module_conflict.bubble_shown";
+
 // A string pref for storing the salt used to compute the pepper device ID.
 const char kDRMSalt[] = "settings.privacy.drm_salt";
 // A boolean pref that enables the (private) pepper GetDeviceID() call.