MacViews: Views accelerators table should match the Cocoa one.

chrome/browser/ui/views/accelerator_table.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 "chrome/browser/ui/views/accelerator_table.h"
 
 #include <stddef.h>
 
+#include <algorithm>
+#include <initializer_list>
+#include <set>
+#include <tuple>
+
 #include "base/macros.h"
 #include "build/build_config.h"
 #include "chrome/app/chrome_command_ids.h"
 #include "ui/base/accelerators/accelerator.h"
 #include "ui/events/event_constants.h"
 
 #if defined(USE_ASH)
 #include "ash/common/accelerators/accelerator_table.h"  // nogncheck
 #endif
 
 namespace chrome {
 namespace {
 
 // For many commands, the Mac equivalent uses Cmd instead of Ctrl. We only need
 // to list the ones that do not have a key equivalent in the main menu, i.e.
 // only the ones in global_keyboard_shortcuts_mac.mm.
-// TODO(jackhou): If-def out the accelerators that should not be on Mac.
 #if defined(OS_MACOSX)
 const ui::EventFlags kPlatformModifier = ui::EF_COMMAND_DOWN;
 #else
 const ui::EventFlags kPlatformModifier = ui::EF_CONTROL_DOWN;
 #endif
 
-// NOTE: Keep this list in the same (mostly-alphabetical) order as
-// the Windows accelerators in ../../app/chrome_dll.rc.
-// Do not use Ctrl-Alt as a shortcut modifier, as it is used by i18n keyboards:
-// http://blogs.msdn.com/b/oldnewthing/archive/2004/03/29/101121.aspx
-const AcceleratorMapping kAcceleratorMap[] = {
+}  // namespace
+
+std::vector<AcceleratorMapping> GetUnfilteredAcceleratorListForTesting() {
+  // NOTE: Keep this list in the same (mostly-alphabetical) order as the Windows
+  // accelerators in ../../app/chrome_dll.rc.
+  // Do not use Ctrl-Alt as a shortcut modifier, as it is used by i18n
+  // keyboards:
+  // http://blogs.msdn.com/b/oldnewthing/archive/2004/03/29/101121.aspx
+  return {
   { ui::VKEY_LEFT, ui::EF_ALT_DOWN, IDC_BACK },
   { ui::VKEY_BACK, ui::EF_NONE, IDC_BACKSPACE_BACK },
-  { ui::VKEY_D, ui::EF_CONTROL_DOWN, IDC_BOOKMARK_PAGE },
-  { ui::VKEY_D, ui::EF_SHIFT_DOWN | ui::EF_CONTROL_DOWN,
+  { ui::VKEY_D, kPlatformModifier, IDC_BOOKMARK_PAGE },
+  { ui::VKEY_D, ui::EF_SHIFT_DOWN | kPlatformModifier,
     IDC_BOOKMARK_ALL_TABS },
-  { ui::VKEY_W, ui::EF_CONTROL_DOWN, IDC_CLOSE_TAB },
-  { ui::VKEY_W, ui::EF_SHIFT_DOWN | ui::EF_CONTROL_DOWN, IDC_CLOSE_WINDOW },
-  { ui::VKEY_F, ui::EF_CONTROL_DOWN, IDC_FIND },
-  { ui::VKEY_G, ui::EF_CONTROL_DOWN, IDC_FIND_NEXT },
-  { ui::VKEY_G, ui::EF_SHIFT_DOWN | ui::EF_CONTROL_DOWN, IDC_FIND_PREVIOUS },
+  { ui::VKEY_W, kPlatformModifier, IDC_CLOSE_TAB },
+  { ui::VKEY_W, ui::EF_SHIFT_DOWN | kPlatformModifier, IDC_CLOSE_WINDOW },
+  { ui::VKEY_F, kPlatformModifier, IDC_FIND },
+  { ui::VKEY_G, kPlatformModifier, IDC_FIND_NEXT },
+  { ui::VKEY_G, ui::EF_SHIFT_DOWN | kPlatformModifier, IDC_FIND_PREVIOUS },
   { ui::VKEY_D, ui::EF_ALT_DOWN, IDC_FOCUS_LOCATION },
-  { ui::VKEY_L, ui::EF_CONTROL_DOWN, IDC_FOCUS_LOCATION },
+  { ui::VKEY_L, kPlatformModifier, IDC_FOCUS_LOCATION },
   { ui::VKEY_K, ui::EF_CONTROL_DOWN, IDC_FOCUS_SEARCH },
   { ui::VKEY_E, ui::EF_CONTROL_DOWN, IDC_FOCUS_SEARCH },
   { ui::VKEY_T, ui::EF_SHIFT_DOWN | ui::EF_ALT_DOWN, IDC_FOCUS_TOOLBAR },
   { ui::VKEY_B, ui::EF_SHIFT_DOWN | ui::EF_ALT_DOWN, IDC_FOCUS_BOOKMARKS },
   { ui::VKEY_A, ui::EF_SHIFT_DOWN | ui::EF_ALT_DOWN, IDC_FOCUS_INFOBARS },
   { ui::VKEY_RIGHT, ui::EF_ALT_DOWN, IDC_FORWARD },
   { ui::VKEY_BACK, ui::EF_SHIFT_DOWN, IDC_BACKSPACE_FORWARD },
   { ui::VKEY_I, ui::EF_SHIFT_DOWN | ui::EF_CONTROL_DOWN, IDC_DEV_TOOLS },
   { ui::VKEY_F12, ui::EF_NONE, IDC_DEV_TOOLS_TOGGLE },
   { ui::VKEY_J, ui::EF_SHIFT_DOWN | ui::EF_CONTROL_DOWN,
     IDC_DEV_TOOLS_CONSOLE },
   { ui::VKEY_C, ui::EF_SHIFT_DOWN | ui::EF_CONTROL_DOWN,
     IDC_DEV_TOOLS_INSPECT },
-  { ui::VKEY_O, ui::EF_CONTROL_DOWN, IDC_OPEN_FILE },
-  { ui::VKEY_P, ui::EF_CONTROL_DOWN, IDC_PRINT},
+  { ui::VKEY_O, kPlatformModifier, IDC_OPEN_FILE },
+  { ui::VKEY_P, kPlatformModifier, IDC_PRINT },
 #if defined(ENABLE_BASIC_PRINTING)
   { ui::VKEY_P, ui::EF_SHIFT_DOWN | ui::EF_CONTROL_DOWN, IDC_BASIC_PRINT},
 #endif  // ENABLE_BASIC_PRINTING
-  { ui::VKEY_R, ui::EF_CONTROL_DOWN, IDC_RELOAD },
-  { ui::VKEY_R, ui::EF_SHIFT_DOWN | ui::EF_CONTROL_DOWN,
+  { ui::VKEY_R, kPlatformModifier, IDC_RELOAD },
+  { ui::VKEY_R, ui::EF_SHIFT_DOWN | kPlatformModifier,
     IDC_RELOAD_BYPASSING_CACHE },
   { ui::VKEY_HOME, ui::EF_ALT_DOWN, IDC_HOME },
-  { ui::VKEY_S, ui::EF_CONTROL_DOWN, IDC_SAVE_PAGE },
+  { ui::VKEY_S, kPlatformModifier, IDC_SAVE_PAGE },
   { ui::VKEY_9, kPlatformModifier, IDC_SELECT_LAST_TAB },
   { ui::VKEY_NUMPAD9, kPlatformModifier, IDC_SELECT_LAST_TAB },
 #if defined(OS_LINUX) && !defined(OS_CHROMEOS)
   { ui::VKEY_9, ui::EF_ALT_DOWN, IDC_SELECT_LAST_TAB },
   { ui::VKEY_NUMPAD9, ui::EF_ALT_DOWN, IDC_SELECT_LAST_TAB },
   { ui::VKEY_NEXT, ui::EF_CONTROL_DOWN | ui::EF_SHIFT_DOWN, IDC_MOVE_TAB_NEXT },
   { ui::VKEY_PRIOR, ui::EF_CONTROL_DOWN | ui::EF_SHIFT_DOWN,
     IDC_MOVE_TAB_PREVIOUS },
 #endif
   { ui::VKEY_TAB, ui::EF_CONTROL_DOWN, IDC_SELECT_NEXT_TAB },
@@ skipping 29 matching lines @@
   { ui::VKEY_5, ui::EF_ALT_DOWN, IDC_SELECT_TAB_4 },
   { ui::VKEY_NUMPAD5, ui::EF_ALT_DOWN, IDC_SELECT_TAB_4 },
   { ui::VKEY_6, ui::EF_ALT_DOWN, IDC_SELECT_TAB_5 },
   { ui::VKEY_NUMPAD6, ui::EF_ALT_DOWN, IDC_SELECT_TAB_5 },
   { ui::VKEY_7, ui::EF_ALT_DOWN, IDC_SELECT_TAB_6 },
   { ui::VKEY_NUMPAD7, ui::EF_ALT_DOWN, IDC_SELECT_TAB_6 },
   { ui::VKEY_8, ui::EF_ALT_DOWN, IDC_SELECT_TAB_7 },
   { ui::VKEY_NUMPAD8, ui::EF_ALT_DOWN, IDC_SELECT_TAB_7 },
   { ui::VKEY_BROWSER_FAVORITES, ui::EF_NONE, IDC_SHOW_BOOKMARK_BAR },
 #endif
-  { ui::VKEY_B, ui::EF_SHIFT_DOWN | ui::EF_CONTROL_DOWN,
+  { ui::VKEY_B, ui::EF_SHIFT_DOWN | kPlatformModifier,
     IDC_SHOW_BOOKMARK_BAR },
   { ui::VKEY_O, ui::EF_SHIFT_DOWN | ui::EF_CONTROL_DOWN,
     IDC_SHOW_BOOKMARK_MANAGER },
   { ui::VKEY_J, ui::EF_CONTROL_DOWN, IDC_SHOW_DOWNLOADS },
   { ui::VKEY_H, ui::EF_CONTROL_DOWN, IDC_SHOW_HISTORY },
   { ui::VKEY_F, ui::EF_ALT_DOWN, IDC_SHOW_APP_MENU},
   { ui::VKEY_E, ui::EF_ALT_DOWN, IDC_SHOW_APP_MENU},
   { ui::VKEY_ESCAPE, ui::EF_NONE, IDC_STOP },
   { ui::VKEY_U, ui::EF_CONTROL_DOWN, IDC_VIEW_SOURCE },
-  { ui::VKEY_OEM_MINUS, ui::EF_CONTROL_DOWN, IDC_ZOOM_MINUS },
-  { ui::VKEY_SUBTRACT, ui::EF_CONTROL_DOWN, IDC_ZOOM_MINUS },
-  { ui::VKEY_0, ui::EF_CONTROL_DOWN, IDC_ZOOM_NORMAL },
-  { ui::VKEY_NUMPAD0, ui::EF_CONTROL_DOWN, IDC_ZOOM_NORMAL },
-  { ui::VKEY_OEM_PLUS, ui::EF_CONTROL_DOWN, IDC_ZOOM_PLUS },
-  { ui::VKEY_ADD, ui::EF_CONTROL_DOWN, IDC_ZOOM_PLUS },
+  { ui::VKEY_OEM_MINUS, kPlatformModifier, IDC_ZOOM_MINUS },
+  { ui::VKEY_SUBTRACT, kPlatformModifier, IDC_ZOOM_MINUS },
+  { ui::VKEY_0, kPlatformModifier, IDC_ZOOM_NORMAL },
+  { ui::VKEY_NUMPAD0, kPlatformModifier, IDC_ZOOM_NORMAL },
+  { ui::VKEY_OEM_PLUS, kPlatformModifier, IDC_ZOOM_PLUS },
+  { ui::VKEY_ADD, kPlatformModifier, IDC_ZOOM_PLUS },
+
+#if !defined(OS_MACOSX)  // Function keys aren't mapped on Mac.
   { ui::VKEY_F1, ui::EF_NONE, IDC_HELP_PAGE_VIA_KEYBOARD },
   { ui::VKEY_F3, ui::EF_NONE, IDC_FIND_NEXT },
   { ui::VKEY_F3, ui::EF_SHIFT_DOWN, IDC_FIND_PREVIOUS },
   { ui::VKEY_F4, ui::EF_CONTROL_DOWN, IDC_CLOSE_TAB },
   { ui::VKEY_F4, ui::EF_ALT_DOWN, IDC_CLOSE_WINDOW },
   { ui::VKEY_F5, ui::EF_NONE, IDC_RELOAD },
   { ui::VKEY_F5, ui::EF_CONTROL_DOWN, IDC_RELOAD_BYPASSING_CACHE },
   { ui::VKEY_F5, ui::EF_SHIFT_DOWN, IDC_RELOAD_BYPASSING_CACHE },
   { ui::VKEY_F6, ui::EF_NONE, IDC_FOCUS_NEXT_PANE },
   { ui::VKEY_F6, ui::EF_SHIFT_DOWN, IDC_FOCUS_PREVIOUS_PANE },
   { ui::VKEY_F10, ui::EF_NONE, IDC_FOCUS_MENU_BAR },
   { ui::VKEY_F11, ui::EF_NONE, IDC_FULLSCREEN },
+#endif  // !OS_MACOSX
 
   // Platform-specific key maps.
 #if defined(OS_LINUX)
   { ui::VKEY_BROWSER_BACK, ui::EF_NONE, IDC_BACK },
   { ui::VKEY_BROWSER_FORWARD, ui::EF_NONE, IDC_FORWARD },
   { ui::VKEY_BROWSER_HOME, ui::EF_NONE, IDC_HOME },
   { ui::VKEY_BROWSER_REFRESH, ui::EF_NONE, IDC_RELOAD },
   { ui::VKEY_BROWSER_REFRESH, ui::EF_CONTROL_DOWN, IDC_RELOAD_BYPASSING_CACHE },
   { ui::VKEY_BROWSER_REFRESH, ui::EF_SHIFT_DOWN, IDC_RELOAD_BYPASSING_CACHE },
 #endif  // defined(OS_LINUX)
 
 #if defined(OS_CHROMEOS)
   // On Chrome OS, VKEY_BROWSER_SEARCH is handled in Ash.
   { ui::VKEY_BACK, ui::EF_SHIFT_DOWN | ui::EF_CONTROL_DOWN,
     IDC_CLEAR_BROWSING_DATA },
   { ui::VKEY_OEM_2, ui::EF_CONTROL_DOWN, IDC_HELP_PAGE_VIA_KEYBOARD },
   { ui::VKEY_OEM_2, ui::EF_SHIFT_DOWN | ui::EF_CONTROL_DOWN,
     IDC_HELP_PAGE_VIA_KEYBOARD },
   { ui::VKEY_BROWSER_FAVORITES, ui::EF_NONE, IDC_SHOW_BOOKMARK_MANAGER },
   { ui::VKEY_BROWSER_STOP, ui::EF_NONE, IDC_STOP },
   { ui::VKEY_P, ui::EF_CONTROL_DOWN | ui::EF_ALT_DOWN,
     IDC_TOUCH_HUD_PROJECTION_TOGGLE },
-#else  // OS_CHROMEOS
+#else
   { ui::VKEY_ESCAPE, ui::EF_SHIFT_DOWN, IDC_TASK_MANAGER },
   { ui::VKEY_DELETE, ui::EF_SHIFT_DOWN | ui::EF_CONTROL_DOWN,
     IDC_CLEAR_BROWSING_DATA },
   { ui::VKEY_LMENU, ui::EF_NONE, IDC_FOCUS_MENU_BAR },
   { ui::VKEY_MENU, ui::EF_NONE, IDC_FOCUS_MENU_BAR },
   { ui::VKEY_RMENU, ui::EF_NONE, IDC_FOCUS_MENU_BAR },
   // On Windows, all VKEY_BROWSER_* keys except VKEY_BROWSER_SEARCH are handled
   // via WM_APPCOMMAND.
   { ui::VKEY_BROWSER_SEARCH, ui::EF_NONE, IDC_FOCUS_SEARCH },
-  { ui::VKEY_M, ui::EF_SHIFT_DOWN | kPlatformModifier, IDC_SHOW_AVATAR_MENU},
+  { ui::VKEY_M, ui::EF_SHIFT_DOWN | kPlatformModifier, IDC_SHOW_AVATAR_MENU },
   // On Chrome OS, these keys are assigned to change UI scale.
   { ui::VKEY_OEM_PLUS, ui::EF_SHIFT_DOWN | ui::EF_CONTROL_DOWN, IDC_ZOOM_PLUS },
   { ui::VKEY_OEM_MINUS, ui::EF_SHIFT_DOWN | ui::EF_CONTROL_DOWN,
     IDC_ZOOM_MINUS },
   // For each entry here add an entry into kChromeCmdId2AshActionId below
   // if Ash has a corresponding accelerator.
 #if defined(GOOGLE_CHROME_BUILD)
   { ui::VKEY_I, ui::EF_SHIFT_DOWN | ui::EF_ALT_DOWN, IDC_FEEDBACK },
 #endif
   { ui::VKEY_Q, ui::EF_SHIFT_DOWN | ui::EF_CONTROL_DOWN, IDC_EXIT },
-  { ui::VKEY_N, ui::EF_SHIFT_DOWN | ui::EF_CONTROL_DOWN,
+  { ui::VKEY_N, ui::EF_SHIFT_DOWN | kPlatformModifier,
     IDC_NEW_INCOGNITO_WINDOW },
-  { ui::VKEY_T, ui::EF_CONTROL_DOWN, IDC_NEW_TAB },
-  { ui::VKEY_N, ui::EF_CONTROL_DOWN, IDC_NEW_WINDOW },
-  { ui::VKEY_T, ui::EF_SHIFT_DOWN | ui::EF_CONTROL_DOWN, IDC_RESTORE_TAB },
-#endif
-};
-const size_t kAcceleratorMapLength = arraysize(kAcceleratorMap);
+  { ui::VKEY_T, kPlatformModifier, IDC_NEW_TAB },
+  { ui::VKEY_N, kPlatformModifier, IDC_NEW_WINDOW },
+  { ui::VKEY_T, ui::EF_SHIFT_DOWN | kPlatformModifier, IDC_RESTORE_TAB },
+#endif  // !OS_CHROMEOS
+
+#if defined(OS_MACOSX)
+  // VKEY_OEM_4 is Left Brace '[{' key.
+  { ui::VKEY_OEM_4, ui::EF_COMMAND_DOWN, IDC_BACK },
+  { ui::VKEY_LEFT, ui::EF_COMMAND_DOWN, IDC_BACK },
+#if defined(ENABLE_BASIC_PRINTING)
+  { ui::VKEY_P, ui::EF_COMMAND_DOWN | ui::EF_ALT_DOWN, IDC_BASIC_PRINT },
+#endif  // ENABLE_BASIC_PRINTING
+  { ui::VKEY_BACK, ui::EF_COMMAND_DOWN | ui::EF_SHIFT_DOWN,
+    IDC_CLEAR_BROWSING_DATA },
+  { ui::VKEY_V, ui::EF_COMMAND_DOWN | ui::EF_SHIFT_DOWN,
+    IDC_CONTENT_CONTEXT_PASTE_AND_MATCH_STYLE },
+  { ui::VKEY_Z, ui::EF_COMMAND_DOWN | ui::EF_SHIFT_DOWN,
+    IDC_CONTENT_CONTEXT_REDO },
+  { ui::VKEY_A, ui::EF_COMMAND_DOWN, IDC_CONTENT_CONTEXT_SELECTALL },
+  { ui::VKEY_Z, ui::EF_COMMAND_DOWN, IDC_CONTENT_CONTEXT_UNDO },
+  { ui::VKEY_I, ui::EF_COMMAND_DOWN | ui::EF_ALT_DOWN, IDC_DEV_TOOLS },
+  { ui::VKEY_J, ui::EF_COMMAND_DOWN | ui::EF_ALT_DOWN, IDC_DEV_TOOLS_CONSOLE },
+  { ui::VKEY_C, ui::EF_COMMAND_DOWN | ui::EF_SHIFT_DOWN, IDC_DEV_TOOLS_INSPECT},
+  { ui::VKEY_I, ui::EF_COMMAND_DOWN | ui::EF_SHIFT_DOWN,
+    IDC_EMAIL_PAGE_LOCATION },
+  { ui::VKEY_Q, ui::EF_COMMAND_DOWN, IDC_EXIT },
+  { ui::VKEY_F, ui::EF_COMMAND_DOWN | ui::EF_ALT_DOWN, IDC_FOCUS_SEARCH },
+  // VKEY_OEM_6 is Right Brace ']}' key.
+  { ui::VKEY_OEM_6, ui::EF_COMMAND_DOWN, IDC_FORWARD },
+  { ui::VKEY_RIGHT, ui::EF_COMMAND_DOWN, IDC_FORWARD },
+  { ui::VKEY_F, ui::EF_COMMAND_DOWN | ui::EF_CONTROL_DOWN, IDC_FULLSCREEN },
+  // VKEY_OEM_2 is Slash '/?' key.
+  { ui::VKEY_OEM_2, ui::EF_COMMAND_DOWN | ui::EF_SHIFT_DOWN,
+    IDC_HELP_PAGE_VIA_MENU },
+  { ui::VKEY_H, ui::EF_COMMAND_DOWN, IDC_HIDE_APP },
+  { ui::VKEY_H, ui::EF_COMMAND_DOWN | ui::EF_SHIFT_DOWN, IDC_HOME },
+  { ui::VKEY_M, ui::EF_COMMAND_DOWN, IDC_MINIMIZE_WINDOW },
+  { ui::VKEY_RIGHT, ui::EF_COMMAND_DOWN | ui::EF_ALT_DOWN,
+    IDC_SELECT_NEXT_TAB },
+  { ui::VKEY_LEFT, ui::EF_COMMAND_DOWN | ui::EF_ALT_DOWN,
+    IDC_SELECT_PREVIOUS_TAB },
+  { ui::VKEY_B, ui::EF_COMMAND_DOWN | ui::EF_ALT_DOWN,
+    IDC_SHOW_BOOKMARK_MANAGER },
+  { ui::VKEY_J, ui::EF_COMMAND_DOWN | ui::EF_SHIFT_DOWN, IDC_SHOW_DOWNLOADS },
+  { ui::VKEY_L, ui::EF_COMMAND_DOWN | ui::EF_ALT_DOWN, IDC_SHOW_DOWNLOADS },
+  { ui::VKEY_Y, ui::EF_COMMAND_DOWN, IDC_SHOW_HISTORY },
+  { ui::VKEY_OEM_PERIOD, ui::EF_COMMAND_DOWN, IDC_STOP },
+  { ui::VKEY_U, ui::EF_COMMAND_DOWN | ui::EF_ALT_DOWN, IDC_VIEW_SOURCE },
+#endif  // OS_MACOSX
+  };
+}
+
+namespace {
 
 const int kRepeatableCommandIds[] = {
   IDC_FIND_NEXT,
   IDC_FIND_PREVIOUS,
   IDC_FOCUS_NEXT_PANE,
   IDC_FOCUS_PREVIOUS_PANE,
   IDC_MOVE_TAB_NEXT,
   IDC_MOVE_TAB_PREVIOUS,
   IDC_SELECT_NEXT_TAB,
   IDC_SELECT_PREVIOUS_TAB,
@@ skipping 22 matching lines @@
   { IDC_TOUCH_HUD_PROJECTION_TOGGLE, ash::TOUCH_HUD_PROJECTION_TOGGLE },
 #endif
 };
 const size_t kChromeCmdId2AshActionIdLength =
     arraysize(kChromeCmdId2AshActionId);
 #endif // defined(USE_ASH)
 
 } // namespace
 
 std::vector<AcceleratorMapping> GetAcceleratorList() {
-  return std::vector<AcceleratorMapping>(
-      kAcceleratorMap, kAcceleratorMap + kAcceleratorMapLength);
+  static bool is_accelerator_list_initialized = false;
+  CR_DEFINE_STATIC_LOCAL(std::vector<AcceleratorMapping>, accelerators,
+                         (GetUnfilteredAcceleratorListForTesting()));
+  if (is_accelerator_list_initialized)
+    return accelerators;
+
+  is_accelerator_list_initialized = true;
+#if defined(OS_MACOSX)
+  // Control modifier is rarely used on Mac, so we allow it only in several
+  // whitelisted cases.
+  const std::set<int> kControlWhitelist = {
+      IDC_SELECT_NEXT_TAB, IDC_SELECT_PREVIOUS_TAB, IDC_FULLSCREEN,
+  };
+
+  auto remove_accelerators = [&kControlWhitelist](const AcceleratorMapping& m) {
+    // Alt by itself (or with just shift) is never used on Mac since it's used
+    // to generate non-ASCII characters. Such commands are given Mac-specific
+    // bindings as well, so remove the mappings with Alt, but not those with
+    // Command or Control.
+    constexpr int kNonShiftMask =
+        ui::EF_COMMAND_DOWN | ui::EF_CONTROL_DOWN | ui::EF_ALT_DOWN;
+    if ((m.modifiers & kNonShiftMask) == ui::EF_ALT_DOWN)
+      return true;
+
+    // If command uses Control modifier it has to be whitelisted.
+    if ((m.modifiers & ui::EF_CONTROL_DOWN) != 0 &&
+        kControlWhitelist.count(m.command_id) == 0)
+      return true;
+
+    return false;
+  };
+  accelerators.erase(std::remove_if(accelerators.begin(), accelerators.end(),
+                                    remove_accelerators),
+                     accelerators.end());
+#endif  // OS_MACOSX
+  return accelerators;
 }
 
 bool GetAshAcceleratorForCommandId(int command_id,
                                    ui::Accelerator* accelerator) {
 #if defined(USE_ASH)
   for (size_t i = 0; i < kChromeCmdId2AshActionIdLength; ++i) {
     if (command_id == kChromeCmdId2AshActionId[i].chrome_cmd_id) {
       for (size_t j = 0; j < ash::kAcceleratorDataLength; ++j) {
         if (kChromeCmdId2AshActionId[i].ash_action_id ==
             ash::kAcceleratorData[j].action) {
           *accelerator = ui::Accelerator(ash::kAcceleratorData[j].keycode,
                                          ash::kAcceleratorData[j].modifiers);
           return true;
         }
       }
     }
   }
 #endif // defined(USE_ASH)
   return false;
 }
 
 bool GetStandardAcceleratorForCommandId(int command_id,
                                         ui::Accelerator* accelerator) {
   // The standard Ctrl-X, Ctrl-V and Ctrl-C are not defined as accelerators
   // anywhere else.
   switch (command_id) {
     case IDC_CUT:
-      *accelerator = ui::Accelerator(ui::VKEY_X, ui::EF_CONTROL_DOWN);
+      *accelerator = ui::Accelerator(ui::VKEY_X, kPlatformModifier);
       return true;
     case IDC_COPY:
-      *accelerator = ui::Accelerator(ui::VKEY_C, ui::EF_CONTROL_DOWN);
+      *accelerator = ui::Accelerator(ui::VKEY_C, kPlatformModifier);
       return true;
     case IDC_PASTE:
-      *accelerator = ui::Accelerator(ui::VKEY_V, ui::EF_CONTROL_DOWN);
+      *accelerator = ui::Accelerator(ui::VKEY_V, kPlatformModifier);
       return true;
   }
   return false;
 }
 
 bool IsCommandRepeatable(int command_id) {
   for (size_t i = 0; i < kRepeatableCommandIdsLength; ++i) {
     if (kRepeatableCommandIds[i] == command_id)
       return true;
   }
   return false;
 }
 
 }  // namespace chrome