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

chrome/browser/extensions/api/declarative_webrequest/webrequest_action_unittest.cc

 // Copyright (c) 2012 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 "extensions/browser/api/declarative_webrequest/webrequest_action.h"
 
 #include "base/files/file_path.h"
 #include "base/json/json_file_value_serializer.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 540 matching lines @@
       " \"instanceType\": \"declarativeWebRequest.RedirectToTransparentImage\""
       "},"
       "{"
       " \"instanceType\": \"declarativeWebRequest.RedirectToEmptyDocument\""
       "},"
       "{"
       " \"instanceType\": \"declarativeWebRequest.IgnoreRules\","
       " \"lowerPriorityThan\": 123,"
       " \"hasTag\": \"some_tag\""
       "}]";
-  const char* kExpectedNames[] = {
+  const char* const kExpectedNames[] = {
     "declarativeWebRequest.RedirectRequest",
     "declarativeWebRequest.RedirectByRegEx",
     "declarativeWebRequest.SetRequestHeader",
     "declarativeWebRequest.RemoveRequestHeader",
     "declarativeWebRequest.AddResponseHeader",
     "declarativeWebRequest.RemoveResponseHeader",
     "declarativeWebRequest.SendMessageToExtension",
     "declarativeWebRequest.AddRequestCookie",
     "declarativeWebRequest.AddResponseCookie",
     "declarativeWebRequest.EditRequestCookie",
@@ skipping 11 matching lines @@
   for (WebRequestActionSet::Actions::const_iterator it =
            action_set->actions().begin();
        it != action_set->actions().end();
        ++it) {
     EXPECT_EQ(kExpectedNames[index], (*it)->GetName());
     ++index;
   }
 }
 
 }  // namespace extensions