Add EF_IS_REPEAT flag to KeyEvent to handle repeated accelerators correctly.

ui/wm/core/accelerator_delegate.h

Index: ui/wm/core/accelerator_delegate.h
diff --git a/ui/wm/core/accelerator_delegate.h b/ui/wm/core/accelerator_delegate.h
index dccabda2e7bebaa142536bb04236c47120f3d6c7..3929969a88eb12c9517819e68435c084be511b0e 100644
--- a/ui/wm/core/accelerator_delegate.h
+++ b/ui/wm/core/accelerator_delegate.h
@@ -16,9 +16,6 @@ class AcceleratorDelegate {
  public:
   virtual ~AcceleratorDelegate() {}
 
-  // TODO(oshima): Move the repeat detection to AcceleratorFilter.
-  virtual void PreProcessAccelerator(const ui::Accelerator& accelerator) = 0;
-
   // Returns true if the window should be allowed a chance to handle
   // system keys.
   virtual bool CanConsumeSystemKeys(const ui::KeyEvent& event) = 0;