Cleanup: Better constify some strings in chrome/browser/{chromeos,extensions}.

chrome/browser/chromeos/extensions/wallpaper_function_base.cc

 // Copyright 2013 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/chromeos/extensions/wallpaper_function_base.h"
 
 #include "base/synchronization/cancellation_flag.h"
 #include "chrome/browser/image_decoder.h"
 #include "chrome/grit/generated_resources.h"
 #include "chromeos/login/login_state.h"
 #include "ui/base/l10n/l10n_util.h"
 
 using content::BrowserThread;
 
 namespace wallpaper_api_util {
 namespace {
 
 // Keeps in sync (same order) with WallpaperLayout enum in header file.
-const char* kWallpaperLayoutArrays[] = {
+const char* const kWallpaperLayoutArrays[] = {
   "CENTER",
   "CENTER_CROPPED",
   "STRETCH",
   "TILE"
 };
 
 const int kWallpaperLayoutCount = arraysize(kWallpaperLayoutArrays);
 
-} // namespace
+}  // namespace
 
 const char kCancelWallpaperMessage[] = "Set wallpaper was canceled.";
 
 ash::WallpaperLayout GetLayoutEnum(const std::string& layout) {
   for (int i = 0; i < kWallpaperLayoutCount; i++) {
     if (layout.compare(kWallpaperLayoutArrays[i]) == 0)
       return static_cast<ash::WallpaperLayout>(i);
   }
   // Default to use CENTER layout.
   return ash::WALLPAPER_LAYOUT_CENTER;
@@ skipping 80 matching lines @@
   unsafe_wallpaper_decoder_ = NULL;
   SetError(wallpaper_api_util::kCancelWallpaperMessage);
   SendResponse(false);
 }
 
 void WallpaperFunctionBase::OnFailure(const std::string& error) {
   unsafe_wallpaper_decoder_ = NULL;
   SetError(error);
   SendResponse(false);
 }