Add FilePath to base namespace.

chrome/browser/extensions/updater/extension_downloader_delegate.h

Index: chrome/browser/extensions/updater/extension_downloader_delegate.h
diff --git a/chrome/browser/extensions/updater/extension_downloader_delegate.h b/chrome/browser/extensions/updater/extension_downloader_delegate.h
index dd0b6c132ffd370b7ded10c229339420101846a3..58e0dc95b25cd7284be17a898505db9f6e76c242 100644
--- a/chrome/browser/extensions/updater/extension_downloader_delegate.h
+++ b/chrome/browser/extensions/updater/extension_downloader_delegate.h
@@ -11,9 +11,12 @@
 #include "base/time.h"
 #include "chrome/browser/extensions/updater/manifest_fetch_data.h"
 
-class FilePath;
 class GURL;
 
+namespace base {
+class FilePath;
+}
+
 namespace extensions {
 
 class ExtensionDownloaderDelegate {
@@ -80,7 +83,7 @@ class ExtensionDownloaderDelegate {
   // to the delegate.
   virtual void OnExtensionDownloadFinished(
       const std::string& id,
-      const FilePath& path,
+      const base::FilePath& path,
       const GURL& download_url,
       const std::string& version,
       const PingResult& ping_result,