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

extensions/browser/pending_extension_info.cc

 // Copyright 2013 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/pending_extension_info.h"
 
 #include "base/logging.h"
 
 namespace extensions {
 
 PendingExtensionInfo::PendingExtensionInfo(
     const std::string& id,
     const GURL& update_url,
-    const Version& version,
+    const base::Version& version,
     ShouldAllowInstallPredicate should_allow_install,
     bool is_from_sync,
     bool install_silently,
     Manifest::Location install_source,
     int creation_flags,
     bool mark_acknowledged)
     : id_(id),
       update_url_(update_url),
       version_(version),
       should_allow_install_(should_allow_install),
@@ skipping 34 matching lines @@
   // Different install sources; |this| has higher precedence if
   // |install_source_| is the higher priority source.
   Manifest::Location higher_priority_source =
       Manifest::GetHigherPriorityLocation(
           install_source_, other.install_source_);
 
   return higher_priority_source == install_source_ ? 1 : -1;
 }
 
 }  // namespace extensions