Correct const accessors in base/values.(h|cc)

remoting/host/policy_hack/policy_watcher.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.
 
 // Most of this code is copied from:
 //   src/chrome/browser/policy/asynchronous_policy_loader.{h,cc}
 
 #include "remoting/host/policy_hack/policy_watcher.h"
 
 #include "base/bind.h"
@@ skipping 14 matching lines @@
 const int kFallbackReloadDelayMinutes = 15;
 
 // Gets a boolean from a dictionary, or returns a default value if the boolean
 // couldn't be read.
 bool GetBooleanOrDefault(const base::DictionaryValue* dict, const char* key,
                          bool default_if_value_missing,
                          bool default_if_value_not_boolean) {
   if (!dict->HasKey(key)) {
     return default_if_value_missing;
   }
-  base::Value* value;
+  const base::Value* value;
   if (dict->Get(key, &value) && value->IsType(base::Value::TYPE_BOOLEAN)) {
     bool bool_value;
     CHECK(value->GetAsBoolean(&bool_value));
     return bool_value;
   }
   return default_if_value_not_boolean;
 }
 
 // Copies a boolean from one dictionary to another, using a default value
 // if the boolean couldn't be read from the first dictionary.
@@ skipping 108 matching lines @@
   old_policies_.swap(new_policies);
 
   // Notify our client of the changed policies.
   if (!changed_policies->empty()) {
     policy_callback_.Run(changed_policies.Pass());
   }
 }
 
 }  // namespace policy_hack
 }  // namespace remoting