Add window cycle completion and cancellation accelerators in mus+ash.

ui/base/accelerators/accelerator.cc

Index: ui/base/accelerators/accelerator.cc
diff --git a/ui/base/accelerators/accelerator.cc b/ui/base/accelerators/accelerator.cc
index c97254441cece2c0f56237d516882bd6e629fb27..8b8d14e1a5fbee1cef1c0cbd95b1d9f6ac8cecbb 100644
--- a/ui/base/accelerators/accelerator.cc
+++ b/ui/base/accelerators/accelerator.cc
@@ -37,9 +37,11 @@ const int kInterestingFlagsMask =
 
 Accelerator::Accelerator() : Accelerator(VKEY_UNKNOWN, EF_NONE) {}
 
-Accelerator::Accelerator(KeyboardCode key_code, int modifiers)
+Accelerator::Accelerator(KeyboardCode key_code,
+                         int modifiers,
+                         KeyState key_state)
     : key_code_(key_code),
-      key_state_(KeyState::PRESSED),
+      key_state_(key_state),
       modifiers_(modifiers & kInterestingFlagsMask) {}
 
 Accelerator::Accelerator(const KeyEvent& key_event)