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

chrome/browser/managed_mode/managed_mode_interstitial.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/managed_mode/managed_mode_interstitial.h"
 
 #include "base/i18n/rtl.h"
 #include "base/metrics/histogram.h"
 #include "base/prefs/pref_service.h"
 #include "base/strings/utf_string_conversions.h"
@@ skipping 82 matching lines @@
 
   languages_ = prefs->GetString(prefs::kAcceptLanguages);
   interstitial_page_ =
       content::InterstitialPage::Create(web_contents, true, url_, this);
   interstitial_page_->Show();
 }
 
 ManagedModeInterstitial::~ManagedModeInterstitial() {}
 
 std::string ManagedModeInterstitial::GetHTMLContents() {
-  DictionaryValue strings;
+  base::DictionaryValue strings;
   strings.SetString("blockPageTitle",
                     l10n_util::GetStringUTF16(IDS_BLOCK_INTERSTITIAL_TITLE));
 
   Profile* profile =
       Profile::FromBrowserContext(web_contents_->GetBrowserContext());
   ManagedUserService* managed_user_service =
       ManagedUserServiceFactory::GetForProfile(profile);
 
   bool allow_access_requests = managed_user_service->AccessRequestsEnabled();
   strings.SetBoolean("allowAccessRequests", allow_access_requests);
@@ skipping 87 matching lines @@
 
 void ManagedModeInterstitial::OnFilteringPrefsChanged() {
   if (ShouldProceed())
     interstitial_page_->Proceed();
 }
 
 void ManagedModeInterstitial::DispatchContinueRequest(bool continue_request) {
   BrowserThread::PostTask(
       BrowserThread::IO, FROM_HERE, base::Bind(callback_, continue_request));
 }