Update AutoImport to import nothing by default (in absence of policy and master_prefs).

chrome/installer/util/master_preferences_constants.h

Index: chrome/installer/util/master_preferences_constants.h
diff --git a/chrome/installer/util/master_preferences_constants.h b/chrome/installer/util/master_preferences_constants.h
index 92bbe4b5f0a898d3ce2a02ddeae4b637fb0396cf..cdccae3641b9e6b0b9e6c9a9cafc900dc4e20d42 100644
--- a/chrome/installer/util/master_preferences_constants.h
+++ b/chrome/installer/util/master_preferences_constants.h
@@ -15,27 +15,13 @@ namespace master_preferences {
 // is specified in master preference as well as command line, the command line
 // value takes precedence.
 
-// Boolean. This is a legacy preference and should no longer be used; it is
-// kept around so that old master_preferences which specify
-// "create_all_shortcuts":false still enforce the new
-// "do_not_create_(desktop|quick_launch)_shortcut" preferences. Setting this to
-// true no longer has any impact.
-extern const char kCreateAllShortcuts[];
 // Boolean pref that disables all logging.
 extern const char kDisableLogging[];
 // Name of the dictionary that holds the distribution values.
 extern const char kDistroDict[];
-// Boolean pref that triggers silent import of the default browser bookmarks.
-extern const char kDistroImportBookmarksPref[];
 // String pref that triggers silent import of bookmarks from the html file at
 // given path.
 extern const char kDistroImportBookmarksFromFilePref[];
-// Boolean pref that triggers silent import of the default browser history.
-extern const char kDistroImportHistoryPref[];
-// Boolean pref that triggers silent import of the default browser homepage.
-extern const char kDistroImportHomePagePref[];
-// Boolean pref that triggers silent import of the default search engine.
-extern const char kDistroImportSearchPref[];
 // Integer. RLZ ping delay in seconds.
 extern const char kDistroPingDelay[];
 // String of Chrome version for which the "set as default browser" infobar will