Add basic Chrome interaction with the mash shelf.

chrome/browser/ui/ash/chrome_launcher_prefs.h

Index: chrome/browser/ui/ash/chrome_launcher_prefs.h
diff --git a/chrome/browser/ui/ash/chrome_launcher_prefs.h b/chrome/browser/ui/ash/chrome_launcher_prefs.h
index 5b04b1639fdcb1202787fe9c4982c999d0b39b1d..bed9b897f572a5b5d58f331b905f948d9fd8dbcb 100644
--- a/chrome/browser/ui/ash/chrome_launcher_prefs.h
+++ b/chrome/browser/ui/ash/chrome_launcher_prefs.h
@@ -7,6 +7,8 @@
 
 #include <string>
 
+#include "ash/shelf/shelf_types.h"
+
 namespace base {
 class DictionaryValue;
 }
@@ -37,6 +39,12 @@ void RegisterChromeLauncherUserPrefs(
 
 base::DictionaryValue* CreateAppDict(const std::string& app_id);
 
+ash::ShelfAlignment AlignmentFromPref(const std::string& value);
+const char* AlignmentToPref(ash::ShelfAlignment alignment);
+
+ash::ShelfAutoHideBehavior AutoHideBehaviorFromPref(const std::string& value);
+const char* AutoHideBehaviorToPref(ash::ShelfAutoHideBehavior behavior);
+
 }  // namespace ash
 
 #endif  // CHROME_BROWSER_UI_ASH_CHROME_LAUNCHER_PREFS_H_