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

chrome/browser/chromeos/extensions/wallpaper_manager_browsertest.cc

 // Copyright 2014 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 "base/files/file_path.h"
 #include "base/path_service.h"
 #include "chrome/browser/apps/app_browsertest_util.h"
 #include "chrome/browser/extensions/component_loader.h"
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/ui/tabs/tab_strip_model.h"
 #include "chrome/test/base/ui_test_utils.h"
 #include "content/public/test/browser_test_utils.h"
 #include "extensions/browser/extension_registry.h"
 #include "extensions/test/extension_test_message_listener.h"
 #include "grit/browser_resources.h"
 
 using extensions::Extension;
 using extensions::ExtensionRegistry;
 
 namespace {
-const char* kWallpaperManagerExtensionID = "obklkkbkpaoaejdabbfldmcfplpdgolj";
+const char kWallpaperManagerExtensionID[] = "obklkkbkpaoaejdabbfldmcfplpdgolj";
 }  // namespace
 
 class WallpaperManagerBrowserTest : public extensions::PlatformAppBrowserTest {
  public:
   WallpaperManagerBrowserTest();
   virtual ~WallpaperManagerBrowserTest();
 
  protected:
   void VerifyWallpaperManagerLoaded();
 
@@ skipping 54 matching lines @@
     ASSERT_TRUE(web_contents);
 
     const std::vector<int> empty_libraries;
     EXPECT_TRUE(ExecuteWebUIResourceTest(web_contents, empty_libraries));
   }
 };
 
 IN_PROC_BROWSER_TEST_F(WallpaperManagerJsTest, EventPageTest) {
   RunTest(base::FilePath(FILE_PATH_LITERAL("event_page_unittest.html")));
 }