Fix MenuRunnerImpl Crash for context menu during drag-and-drop

ui/views/controls/menu/menu_controller.cc

 // Copyright (c) 2012 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/views/controls/menu/menu_controller.h"
 
 #include "base/i18n/case_conversion.h"
 #include "base/i18n/rtl.h"
 #include "base/macros.h"
 #include "base/strings/utf_string_conversions.h"
@@ skipping 1176 matching lines @@
   // TODO(varunjain): Properly determine and send DRAG_EVENT_SOURCE below.
   item->GetWidget()->RunShellDrag(NULL, data, widget_loc, drag_ops,
       ui::DragDropTypes::DRAG_EVENT_SOURCE_MOUSE);
   // MenuController may have been deleted if |async_run_| so check for an active
   // instance before accessing member variables.
   if (GetActiveInstance())
     did_initiate_drag_ = false;
 }
 
 void MenuController::OnKeyDown(ui::KeyboardCode key_code) {
-  DCHECK(blocking_run_);
+  // Do not process while performing drag-and-drop
+  if (!blocking_run_)
+    return;
 
   switch (key_code) {
     case ui::VKEY_UP:
       IncrementSelection(INCREMENT_SELECTION_UP);
       break;
 
     case ui::VKEY_DOWN:
       IncrementSelection(INCREMENT_SELECTION_DOWN);
       break;
 
@@ skipping 1048 matching lines @@
   } else if (details.index_of_item == -1 || details.next_match == -1) {
     SetSelection(submenu->GetMenuItemAt(details.first_match),
                  SELECTION_DEFAULT);
   } else {
     SetSelection(submenu->GetMenuItemAt(details.next_match),
                  SELECTION_DEFAULT);
   }
 }
 
 void MenuController::SelectByChar(base::char16 character) {
+  // Do not process while performing drag-and-drop
+  if (!blocking_run_)
+    return;
   if (!character)
     return;
 
   base::char16 char_array[] = { character, 0 };
   base::char16 key = base::i18n::ToLower(char_array)[0];
   MenuItemView* item = pending_state_.item;
   if (!item->HasSubmenu() || !item->GetSubmenu()->IsShowing())
     item = item->GetParentMenuItem();
   DCHECK(item);
   DCHECK(item->HasSubmenu());
@@ skipping 370 matching lines @@
     return;
   }
   if (hot_button_)
     hot_button_->SetHotTracked(false);
   hot_button_ = hot_button;
   if (hot_button)
     hot_button->SetHotTracked(true);
 }
 
 }  // namespace views