Add MetalayerMode to the palette.

ash/system/palette/palette_ids.cc

 // Copyright 2016 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 "ash/system/palette/palette_ids.h"
 #include "base/logging.h"
 
 namespace ash {
 
 std::string PaletteToolIdToString(PaletteToolId tool_id) {
   switch (tool_id) {
     case PaletteToolId::NONE:
       return "NONE";
     case PaletteToolId::CREATE_NOTE:
       return "CREATE_NOTE";
     case PaletteToolId::CAPTURE_REGION:
       return "CAPTURE_REGION";
     case PaletteToolId::CAPTURE_SCREEN:
       return "CAPTURE_SCREEN";
     case PaletteToolId::LASER_POINTER:
       return "LASER_POINTER";
     case PaletteToolId::MAGNIFY:
       return "MAGNIFY";
+    case PaletteToolId::METALAYER:
+      return "METALAYER";
   }
 
   NOTREACHED();
   return std::string();
 }
 
 std::string PaletteGroupToString(PaletteGroup group) {
   switch (group) {
     case PaletteGroup::ACTION:
       return "ACTION";
@@ skipping 12 matching lines @@
     case PaletteToolId::CREATE_NOTE:
       return PALETTE_NEW_NOTE;
     case PaletteToolId::CAPTURE_REGION:
       return PALETTE_CAPTURE_REGION;
     case PaletteToolId::CAPTURE_SCREEN:
       return PALETTE_CAPTURE_SCREEN;
     case PaletteToolId::LASER_POINTER:
       return PALETTE_LASER_POINTER;
     case PaletteToolId::MAGNIFY:
       return PALETTE_MAGNIFY;
+    case PaletteToolId::METALAYER:
+      return PALETTE_METALAYER;
   }
 
   NOTREACHED();
   return PALETTE_OPTIONS_COUNT;
 }
 
 PaletteModeCancelType PaletteToolIdToPaletteModeCancelType(
     PaletteToolId tool_id,
     bool is_switched) {
   PaletteModeCancelType type = PALETTE_MODE_CANCEL_TYPE_COUNT;
   if (tool_id == PaletteToolId::LASER_POINTER) {
     return is_switched ? PALETTE_MODE_LASER_POINTER_SWITCHED
                        : PALETTE_MODE_LASER_POINTER_CANCELLED;
   } else if (tool_id == PaletteToolId::MAGNIFY) {
     return is_switched ? PALETTE_MODE_MAGNIFY_SWITCHED
                        : PALETTE_MODE_MAGNIFY_CANCELLED;
   }
   return type;
 }
 
 }  // namespace ash