Update some uses of Value in chrome/browser to use the base:: namespace.

chrome/browser/extensions/api/declarative_content/content_condition.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 "chrome/browser/extensions/api/declarative_content/content_condition.h"
 
 #include "base/strings/stringprintf.h"
 #include "base/values.h"
 #include "chrome/browser/extensions/api/declarative_content/content_constants.h"
 #include "components/url_matcher/url_matcher_factory.h"
@@ skipping 76 matching lines @@
     *error = kExpectedOtherConditionType;
     return scoped_ptr<ContentCondition>();
   }
 
   scoped_refptr<URLMatcherConditionSet> url_matcher_condition_set;
   std::vector<std::string> css_rules;
 
   for (base::DictionaryValue::Iterator iter(*condition_dict);
        !iter.IsAtEnd(); iter.Advance()) {
     const std::string& condition_attribute_name = iter.key();
-    const Value& condition_attribute_value = iter.value();
+    const base::Value& condition_attribute_value = iter.value();
     if (condition_attribute_name == keys::kInstanceType) {
       // Skip this.
     } else if (condition_attribute_name == keys::kPageUrl) {
       const base::DictionaryValue* dict = NULL;
       if (!condition_attribute_value.GetAsDictionary(&dict)) {
         *error = base::StringPrintf(kInvalidTypeOfParamter,
                                     condition_attribute_name.c_str());
       } else {
         url_matcher_condition_set =
             URLMatcherFactory::CreateFromURLFilterDictionary(
@@ skipping 29 matching lines @@
         url_matcher_condition_factory->CreateHostPrefixCondition(
             std::string()));
     url_matcher_condition_set =
         new URLMatcherConditionSet(++g_next_id, url_matcher_conditions);
   }
   return scoped_ptr<ContentCondition>(
       new ContentCondition(url_matcher_condition_set, css_rules));
 }
 
 }  // namespace extensions