Add base:: namespace to straggling string16s left in chrome/browser/ui.

chrome/browser/ui/views/toolbar/site_chip_view.cc

Index: chrome/browser/ui/views/toolbar/site_chip_view.cc
diff --git a/chrome/browser/ui/views/toolbar/site_chip_view.cc b/chrome/browser/ui/views/toolbar/site_chip_view.cc
index b0e028aec7811ce796cd884b5e5f83dffe0acea2..ad4623fca0271e53642bb25ca4d2c3cc34457ca4 100644
--- a/chrome/browser/ui/views/toolbar/site_chip_view.cc
+++ b/chrome/browser/ui/views/toolbar/site_chip_view.cc
@@ -172,7 +172,7 @@ int StringForChromeHost(const GURL& url) {
 
 }  // namespace
 
-string16 SiteChipView::SiteLabelFromURL(const GURL& provided_url) {
+base::string16 SiteChipView::SiteLabelFromURL(const GURL& provided_url) {
   // First, strip view-source: if it appears.  Note that GetContent removes
   // "view-source:" but leaves the http, https or ftp scheme.
   GURL url(provided_url);
@@ -349,7 +349,7 @@ void SiteChipView::Update(content::WebContents* web_contents) {
     painter_ = NULL;
   }
 
-  string16 host = SiteLabelFromURL(url_displayed_);
+  base::string16 host = SiteLabelFromURL(url_displayed_);
   if (security_level_ == ToolbarModel::EV_SECURE) {
     host = l10n_util::GetStringFUTF16(IDS_SITE_CHIP_EV_SSL_LABEL,
         toolbar_view_->GetToolbarModel()->GetEVCertName(),