Make mash register initial batch of accelerators in single shot.

ui/base/accelerators/accelerator_manager.cc

Index: ui/base/accelerators/accelerator_manager.cc
diff --git a/ui/base/accelerators/accelerator_manager.cc b/ui/base/accelerators/accelerator_manager.cc
index fad3bf66eebfd288ced3eb05e517c03de3b53e89..5f11edbb26a452f83e28faafd6e75b3a97c52f4a 100644
--- a/ui/base/accelerators/accelerator_manager.cc
+++ b/ui/base/accelerators/accelerator_manager.cc
@@ -24,7 +24,7 @@ void AcceleratorManager::Register(const Accelerator& accelerator,
   AcceleratorTargetList& targets = accelerators_[accelerator].second;
   DCHECK(std::find(targets.begin(), targets.end(), target) == targets.end())
       << "Registering the same target multiple times";
-  const bool is_first_target_for_accelerator = targets.empty();
+  // const bool is_first_target_for_accelerator = targets.empty();
 
   // All priority accelerators go to the front of the line.
   if (priority == kHighPriority) {
@@ -42,8 +42,11 @@ void AcceleratorManager::Register(const Accelerator& accelerator,
     else
       targets.insert(++targets.begin(), target);
   }
-  if (is_first_target_for_accelerator && delegate_)
-    delegate_->OnAcceleratorRegistered(accelerator);
+}
+
+void AcceleratorManager::Registers(std::vector<ui::Accelerator>& accelerators) {
+  if (delegate_)
+    delegate_->OnAcceleratorsRegistered(accelerators);
 }
 
 void AcceleratorManager::Unregister(const Accelerator& accelerator,