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

ash/accelerators/accelerator_table.h

Index: ash/accelerators/accelerator_table.h
diff --git a/ash/accelerators/accelerator_table.h b/ash/accelerators/accelerator_table.h
index 658cad5457071c633c9df7ca71ae23a633a28111..0d0e201eb271809cdc1dff0cc5fa50c532be2d70 100644
--- a/ash/accelerators/accelerator_table.h
+++ b/ash/accelerators/accelerator_table.h
@@ -154,8 +154,8 @@ struct AcceleratorData {
 
 // Gathers the needed data to handle deprecated accelerators.
 struct DeprecatedAcceleratorData {
-  // The old deprecated accelerator.
-  AcceleratorData deprecated_accelerator;
+  // The action that has deprecated accelerators.
+  AcceleratorAction action;
 
   // The name of the UMA histogram that will be used to measure the deprecated
   // v.s. new accelerator usage.
@@ -183,10 +183,14 @@ ASH_EXPORT extern const AcceleratorData kAcceleratorData[];
 ASH_EXPORT extern const size_t kAcceleratorDataLength;
 
 #if defined(OS_CHROMEOS)
-// The list of the deprecated accelerators along with their new replacing ones
-// and how to handle them.
-ASH_EXPORT extern const DeprecatedAcceleratorData kDeprecatedAccelerators[];
+// The list of the deprecated accelerators.
+ASH_EXPORT extern const AcceleratorData kDeprecatedAccelerators[];
 ASH_EXPORT extern const size_t kDeprecatedAcceleratorsLength;
+
+// The list of the actions with deprecated accelerators and the needed data to
+// handle them.
+ASH_EXPORT extern const DeprecatedAcceleratorData kDeprecatedAcceleratorsData[];
+ASH_EXPORT extern const size_t kDeprecatedAcceleratorsDataLength;
 #endif  // defined(OS_CHROMEOS)
 
 // Debug accelerators. Debug accelerators are only enabled when the "Debugging