Consistently use namespaced base::Version.

chrome/browser/ui/startup/default_browser_prompt.cc

Index: chrome/browser/ui/startup/default_browser_prompt.cc
diff --git a/chrome/browser/ui/startup/default_browser_prompt.cc b/chrome/browser/ui/startup/default_browser_prompt.cc
index b423a00ad60c01494754b57090f70898f96e0b73..fb88173530e181057948cf29247e78ac127b10f7 100644
--- a/chrome/browser/ui/startup/default_browser_prompt.cc
+++ b/chrome/browser/ui/startup/default_browser_prompt.cc
@@ -64,10 +64,10 @@ bool ShouldShowDefaultBrowserPrompt(Profile* profile) {
   const std::string disable_version_string =
       g_browser_process->local_state()->GetString(
           prefs::kBrowserSuppressDefaultBrowserPrompt);
-  const Version disable_version(disable_version_string);
+  const base::Version disable_version(disable_version_string);
   DCHECK(disable_version_string.empty() || disable_version.IsValid());
   if (disable_version.IsValid() &&
-      disable_version == Version(version_info::GetVersionNumber())) {
+      disable_version == base::Version(version_info::GetVersionNumber())) {
     return false;
   }