Simplify AcceleratorDelegate interface

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..966f1679e213432eb3cff3aa78de671617e5fd3a 100644
--- a/ui/wm/core/accelerator_delegate.h
+++ b/ui/wm/core/accelerator_delegate.h
@@ -16,20 +16,19 @@ class AcceleratorDelegate {
  public:
   virtual ~AcceleratorDelegate() {}
 
+  // Type of keys that triggers accelerators.
+  enum KeyType {
+    KEY_TYPE_SYSTEM,
+    KEY_TYPE_OTHER,
+  };
+
   // 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;
-
-  // Returns true if the |accelerator| should be processed.
-  virtual bool ShouldProcessAcceleratorNow(
-      const ui::KeyEvent& key_event,
-      const ui::Accelerator& accelerator) = 0;
-
   // Return true if the |accelerator| has been processed.
-  virtual bool ProcessAccelerator(const ui::Accelerator& accelerator) = 0;
+  virtual bool ProcessAccelerator(const ui::KeyEvent& event,
+                                  const ui::Accelerator& accelerator,
+                                  KeyType key_type) = 0;
 };
 
 }  // namespace wm