Update strings for ash palette and rename options/settings files.

ash/common/system/chromeos/palette/tools/capture_region_action.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/common/system/chromeos/palette/tools/capture_region_action.h"
 
 #include "ash/common/accelerators/accelerator_controller.h"
 #include "ash/common/palette_delegate.h"
 #include "ash/common/system/chromeos/palette/palette_ids.h"
 #include "ash/common/system/toast/toast_data.h"
 #include "ash/common/system/toast/toast_manager.h"
 #include "ash/common/wm_shell.h"
-#include "base/strings/utf_string_conversions.h"
 #include "grit/ash_strings.h"
 #include "ui/base/l10n/l10n_util.h"
 
 namespace ash {
 
 namespace {
 
 const char kToastId[] = "palette_capture_region";
 const int kToastDurationMs = 2500;
 
-// TODO(jdufault): Localize toast message. See crbug.com/634558.
-const char kToastMessage[] = "Select a region";
-
 }  // namespace
 
 CaptureRegionAction::CaptureRegionAction(Delegate* delegate)
     : CommonPaletteTool(delegate) {}
 
 CaptureRegionAction::~CaptureRegionAction() {}
 
 PaletteGroup CaptureRegionAction::GetGroup() const {
   return PaletteGroup::ACTION;
 }
 
 PaletteToolId CaptureRegionAction::GetToolId() const {
   return PaletteToolId::CAPTURE_REGION;
 }
 
 void CaptureRegionAction::OnEnable() {
   CommonPaletteTool::OnEnable();
 
-  ToastData toast(kToastId, base::ASCIIToUTF16(kToastMessage), kToastDurationMs,
-                  base::string16());
+  ToastData toast(
+      kToastId, l10n_util::GetStringUTF16(IDS_ASH_PALETTE_CAPTURE_REGION_TOAST),
+      kToastDurationMs, base::string16());
   ash::WmShell::Get()->toast_manager()->Show(toast);
 
   WmShell::Get()->palette_delegate()->TakePartialScreenshot();
   delegate()->DisableTool(GetToolId());
   delegate()->HidePalette();
 }
 
 views::View* CaptureRegionAction::CreateView() {
   return CreateDefaultView(
       l10n_util::GetStringUTF16(IDS_ASH_PALETTE_CAPTURE_REGION_ACTION));
 }
 
 gfx::VectorIconId CaptureRegionAction::GetPaletteIconId() {
   return gfx::VectorIconId::PALETTE_ACTION_CAPTURE_REGION;
 }
 
 }  // namespace ash