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

chrome_frame/test/test_with_web_server.cc

Index: chrome_frame/test/test_with_web_server.cc
diff --git a/chrome_frame/test/test_with_web_server.cc b/chrome_frame/test/test_with_web_server.cc
index 2f762c3932ddadb810a5fa180db8d8b37227b211..1801670e7365ee9e7a17099a7163b2283585b096 100644
--- a/chrome_frame/test/test_with_web_server.cc
+++ b/chrome_frame/test/test_with_web_server.cc
@@ -306,9 +306,9 @@ void ChromeFrameTestWithWebServer::VersionTest(BrowserKind browser,
   // the directory where chrome is installed.
   if (!version_info) {
     BrowserDistribution* dist = BrowserDistribution::GetDistribution();
-    Version ver_system;
+    base::Version ver_system;
     InstallUtil::GetChromeVersion(dist, true, &ver_system);
-    Version ver_user;
+    base::Version ver_user;
     InstallUtil::GetChromeVersion(dist, false, &ver_system);
     ASSERT_TRUE(ver_system.IsValid() || ver_user.IsValid());