Consistently use namespaced base::Version in chrome/installer.

chrome/installer/util/google_chrome_distribution.h

Index: chrome/installer/util/google_chrome_distribution.h
diff --git a/chrome/installer/util/google_chrome_distribution.h b/chrome/installer/util/google_chrome_distribution.h
index 171ce21787cbd04d0daa1898b260584532ff6e87..937484c460f27dec685ac7792614ed3f56c39bd1 100644
--- a/chrome/installer/util/google_chrome_distribution.h
+++ b/chrome/installer/util/google_chrome_distribution.h
@@ -29,7 +29,7 @@ class GoogleChromeDistribution : public BrowserDistribution {
   //   concatenated to the survey url if the file in local_data_path indicates
   //   the user has opted in to providing anonymous usage data.
   void DoPostUninstallOperations(
-      const Version& version,
+      const base::Version& version,
       const base::FilePath& local_data_path,
       const base::string16& distribution_data) override;