Make mash register initial batch of accelerators in single shot.

ui/base/accelerators/accelerator_manager_delegate.h

Index: ui/base/accelerators/accelerator_manager_delegate.h
diff --git a/ui/base/accelerators/accelerator_manager_delegate.h b/ui/base/accelerators/accelerator_manager_delegate.h
index e3c6d9ccf6e53ebee773c721a1374ae0b03e18c0..99370896dca0fa4a1cce17b03bced0abeb0da6e6 100644
--- a/ui/base/accelerators/accelerator_manager_delegate.h
+++ b/ui/base/accelerators/accelerator_manager_delegate.h
@@ -13,15 +13,16 @@ class Accelerator;
 
 class UI_BASE_EXPORT AcceleratorManagerDelegate {
  public:
-  // Called the first time a target is registered for |accelerator|. This is
-  // only called the first time a target is registered for a unique accelerator.
-  // For example, if Register() is called twice with the same accelerator
-  // this is called only for the first call.
-  virtual void OnAcceleratorRegistered(const Accelerator& accelerator) = 0;
-
   // Called when there no more targets are registered for |accelerator|.
   virtual void OnAcceleratorUnregistered(const Accelerator& accelerator) = 0;
 
+  // Called when a number of accelerators are registered at once. An accelerator
+  // is only included in the |accelerators| vector when the first time a target
+  // for the accelerator is registered. For example, if Register() is called
+  // twice with the same accelerator, this is called only for the first call.
+  virtual void OnAcceleratorVectorRegistered(

[mfomitchev, 2017/01/26 21:39:49]

Sorry for back-and-forth on this, but now that we don't have
OnAcceleratorRegistered, can we change the name back to
OnAcceleratorsRegistered? That would be shorter and more consistent with the
naming elsewhere. Also, can you please move it to before
OnAcceleratorUnregistered?

[thanhph1, 2017/01/26 22:24:05]

Done, ya this name is shorter.

+      const std::vector<ui::Accelerator>& accelerators) = 0;
+
  protected:
   virtual ~AcceleratorManagerDelegate() {}
 };