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

chrome/browser/extensions/api/declarative_webrequest/webrequest_rules_registry_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_rules_registry.h"
 
 #include <string>
 #include <vector>
 
 #include "base/basictypes.h"
@@ skipping 625 matching lines @@
 
   const GURL urls[] = {
     GURL("http://url.example.com"),  // matching
     GURL("http://www.example.com")   // non-matching
   };
   const GURL firstPartyUrls[] = {
     GURL("http://www.example.com"),  // non-matching
     GURL("http://fpfc.example.com")  // matching
   };
   // Which rules should match in subsequent test iterations.
-  const char* matchingRuleIds[] = { kRuleId1, kRuleId2 };
+  const char* const matchingRuleIds[] = { kRuleId1, kRuleId2 };
   COMPILE_ASSERT(arraysize(urls) == arraysize(firstPartyUrls),
                  urls_and_firstPartyUrls_need_to_have_the_same_size);
   COMPILE_ASSERT(arraysize(urls) == arraysize(matchingRuleIds),
                  urls_and_matchingRuleIds_need_to_have_the_same_size);
   net::TestURLRequestContext context;
 
   for (size_t i = 0; i < arraysize(matchingRuleIds); ++i) {
     // Construct the inputs.
     scoped_ptr<net::URLRequest> http_request(context.CreateRequest(
         urls[i], net::DEFAULT_PRIORITY, NULL, NULL));
@@ skipping 154 matching lines @@
   // This is a correct match.
   GURL url2("http://foo.com/index.html");
   scoped_ptr<net::URLRequest> request2(context.CreateRequest(
       url2, net::DEFAULT_PRIORITY, NULL, NULL));
   WebRequestData request_data2(request2.get(), ON_BEFORE_REQUEST);
   deltas = registry->CreateDeltas(NULL, request_data2, false);
   EXPECT_EQ(1u, deltas.size());
 }
 
 }  // namespace extensions