Make mash register initial batch of accelerators in single shot.

ui/base/accelerators/accelerator_manager.h

Index: ui/base/accelerators/accelerator_manager.h
diff --git a/ui/base/accelerators/accelerator_manager.h b/ui/base/accelerators/accelerator_manager.h
index 9db9629fd8ecc8a9aabf7fa974fe15f1af2cdd75..8c67d0a8d4a0c36e15d7e7149c841b48628d3562 100644
--- a/ui/base/accelerators/accelerator_manager.h
+++ b/ui/base/accelerators/accelerator_manager.h
@@ -8,6 +8,7 @@
 #include <list>
 #include <map>
 #include <utility>
+#include <vector>
 
 #include "base/macros.h"
 #include "ui/base/accelerators/accelerator.h"
@@ -51,6 +52,8 @@ class UI_BASE_EXPORT AcceleratorManager {
                 HandlerPriority priority,
                 AcceleratorTarget* target);
 
+  void Registers(std::vector<ui::Accelerator>& accelerators);
+
   // Unregister the specified keyboard accelerator for the specified target.
   void Unregister(const Accelerator& accelerator, AcceleratorTarget* target);