Make mash register initial batch of accelerators in single shot.

ash/mus/accelerators/accelerator_controller_registrar.h

Index: ash/mus/accelerators/accelerator_controller_registrar.h
diff --git a/ash/mus/accelerators/accelerator_controller_registrar.h b/ash/mus/accelerators/accelerator_controller_registrar.h
index da2841f6979bc5b64bcfcb49f710e495ba346a34..9c61acc5ddf848a06186aa2d0308989aa1b03e9c 100644
--- a/ash/mus/accelerators/accelerator_controller_registrar.h
+++ b/ash/mus/accelerators/accelerator_controller_registrar.h
@@ -8,6 +8,7 @@
 #include <stdint.h>
 
 #include <map>
+#include <vector>
 
 #include "ash/mus/accelerators/accelerator_handler.h"
 #include "base/macros.h"
@@ -38,11 +39,21 @@ class AcceleratorControllerRegistrar : public AcceleratorHandler,
   ui::mojom::EventResult OnAccelerator(uint32_t id,
                                        const ui::Event& event) override;
 
+ private:
   // ui::AcceleratorManagerDelegate:
   void OnAcceleratorRegistered(const ui::Accelerator& accelerator) override;
   void OnAcceleratorUnregistered(const ui::Accelerator& accelerator) override;
 
- private:
+  void OnAcceleratorsRegistered(

[mfomitchev, 2017/01/24 17:40:01]

Sadrul mentioned that it would be better to call this
OnAcceleratorListRegistered to make it easier to differentiate from
OnAcceleratorRegistered, which seems like a good idea.

OnAcceleratorsRegistered should then be renamed accordingly.

[thanhph1, 2017/01/24 20:26:16]

Done, thanks!

+      const std::vector<ui::Accelerator>& accelerators) override;
+
+  // Generate id and add the corresponding accelerator to accelerator vector.
+  // Creates a PRE_TARGET and POST_TARGET mojom accelerators for the provided
+  // |accelerator| and adds them to the provided |accelerator_vector|.
+  void AddAcceleratorToVector(
+      const ui::Accelerator& accelerator,
+      std::vector<ui::mojom::AcceleratorPtr>& accelerator_vector);
+
   friend class AcceleratorControllerRegistrarTestApi;
 
   // The flow of accelerators in ash is:
@@ -86,6 +97,8 @@ class AcceleratorControllerRegistrar : public AcceleratorHandler,
 
   std::unique_ptr<AcceleratorRouter> router_;
 
+  std::vector<ui::mojom::AcceleratorPtr> accelerator_ptrs_;
+
   // Set of registered local ids.
   std::set<uint16_t> ids_;