browser: Move FindBrowserWithWebContents() into chrome namespace.

chrome/browser/ui/webui/sync_promo/sync_promo_handler.cc

Index: chrome/browser/ui/webui/sync_promo/sync_promo_handler.cc
diff --git a/chrome/browser/ui/webui/sync_promo/sync_promo_handler.cc b/chrome/browser/ui/webui/sync_promo/sync_promo_handler.cc
index d685dc8b8ef3b41673172688a493364f67953d17..1920da4b6a619ad6e3b9d7fced723d044522090e 100644
--- a/chrome/browser/ui/webui/sync_promo/sync_promo_handler.cc
+++ b/chrome/browser/ui/webui/sync_promo/sync_promo_handler.cc
@@ -193,7 +193,7 @@ void SyncPromoHandler::HandleCloseSyncPromo(const base::ListValue* args) {
   // another URL. This prevents the browser window from flashing during
   // close.
   Browser* browser =
-      browser::FindBrowserWithWebContents(web_ui()->GetWebContents());
+      chrome::FindBrowserWithWebContents(web_ui()->GetWebContents());
   if (!browser || !browser->IsAttemptingToCloseBrowser()) {
     // Close the window if it was opened in auto-close mode.
     const GURL& sync_url = web_ui()->GetWebContents()->GetURL();