Deprecate Shift+Alt to switch IME and use Ctrl+Shift+Space instead.

ash/accelerators/accelerator_controller.h

 // 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.
 
 #ifndef ASH_ACCELERATORS_ACCELERATOR_CONTROLLER_H_
 #define ASH_ACCELERATORS_ACCELERATOR_CONTROLLER_H_
 
 #include <map>
 #include <set>
 
@@ skipping 115 matching lines @@
   }
 
   // Overridden from ui::AcceleratorTarget:
   bool AcceleratorPressed(const ui::Accelerator& accelerator) override;
   bool CanHandleAccelerators() const override;
 
  private:
   FRIEND_TEST_ALL_PREFIXES(AcceleratorControllerTest, GlobalAccelerators);
   FRIEND_TEST_ALL_PREFIXES(AcceleratorControllerTest,
                            DontRepeatToggleFullscreen);
+  FRIEND_TEST_ALL_PREFIXES(DeprecatedAcceleratorTester,
+                           TestDeprecatedAcceleratorsBehavior);
 
   // Initializes the accelerators this class handles as a target.
   void Init();
 
   // Registers the specified accelerators.
   void RegisterAccelerators(const AcceleratorData accelerators[],
                             size_t accelerators_length);
 
   // Registers the deprecated accelerators and their replacing new ones.
   void RegisterDeprecatedAccelerators();
@@ skipping 63 matching lines @@
   std::set<int> actions_needing_window_;
   // Actions that can be performed without closing the menu (if one is present).
   std::set<int> actions_keeping_menu_open_;
 
   DISALLOW_COPY_AND_ASSIGN(AcceleratorController);
 };
 
 }  // namespace ash
 
 #endif  // ASH_ACCELERATORS_ACCELERATOR_CONTROLLER_H_