Avoid toggling app list if interrupted by mouse

ui/base/accelerators/accelerator_history.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/base/accelerators/accelerator_history.h"
 
 namespace ui {
 
 AcceleratorHistory::AcceleratorHistory() {}
 
@@ skipping 13 matching lines @@
   } else {
     currently_pressed_keys_.erase(accelerator.key_code());
   }
 
   if (accelerator != current_accelerator_) {
     previous_accelerator_ = current_accelerator_;
     current_accelerator_ = accelerator;
   }
 }
 
+void AcceleratorHistory::InterruptCurrentAccelerator() {
+  if (current_accelerator_.key_state() == Accelerator::KeyState::PRESSED) {
+    // Only interrupts pressed keys.
+    current_accelerator_.set_interrupted_by_mouse_event(true);
+  }
+}
+
 } // namespace ui