Update all users of base::Version to explicitly specify the namespace, and clean up the header.

chrome/browser/ui/pdf/pdf_unsupported_feature.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/ui/pdf/pdf_unsupported_feature.h"
 
 #include "base/bind.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/prefs/pref_service.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/values.h"
-#include "base/version.h"
 #include "chrome/browser/lifetime/application_lifetime.h"
 #include "chrome/browser/plugins/chrome_plugin_service_filter.h"
 #include "chrome/browser/plugins/plugin_finder.h"
 #include "chrome/browser/plugins/plugin_metadata.h"
 #include "chrome/browser/plugins/plugin_prefs.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/renderer_preferences_util.h"
 #include "chrome/browser/tab_contents/tab_util.h"
 #include "chrome/browser/ui/pdf/open_pdf_in_reader_prompt_delegate.h"
 #include "chrome/browser/ui/pdf/pdf_tab_helper.h"
@@ skipping 379 matching lines @@
 
 void PDFHasUnsupportedFeature(content::WebContents* web_contents) {
 #if defined(OS_WIN) && defined(ENABLE_PLUGIN_INSTALLATION)
   // Only works for Windows for now.  For Mac, we'll have to launch the file
   // externally since Adobe Reader doesn't work inside Chrome.
   PluginService::GetInstance()->GetPlugins(base::Bind(&GotPluginsCallback,
       web_contents->GetRenderProcessHost()->GetID(),
       web_contents->GetRenderViewHost()->GetRoutingID()));
 #endif
 }