Update some uses of UTF conversions in chrome/browser to use the base:: namespace.

chrome/browser/ui/gtk/bookmarks/bookmark_bubble_gtk.cc

Index: chrome/browser/ui/gtk/bookmarks/bookmark_bubble_gtk.cc
diff --git a/chrome/browser/ui/gtk/bookmarks/bookmark_bubble_gtk.cc b/chrome/browser/ui/gtk/bookmarks/bookmark_bubble_gtk.cc
index 38f3b610e0badcff4b5fb57eef85604fa0df5553..953e752486b48b5b68b5534614275a3ecb6847e4 100644
--- a/chrome/browser/ui/gtk/bookmarks/bookmark_bubble_gtk.cc
+++ b/chrome/browser/ui/gtk/bookmarks/bookmark_bubble_gtk.cc
@@ -415,7 +415,7 @@ void BookmarkBubbleGtk::ApplyEdits() {
   const BookmarkNode* node = model_->GetMostRecentlyAddedNodeForURL(url_);
   if (node) {
     const base::string16 new_title(
-        UTF8ToUTF16(gtk_entry_get_text(GTK_ENTRY(name_entry_))));
+        base::UTF8ToUTF16(gtk_entry_get_text(GTK_ENTRY(name_entry_))));
 
     if (new_title != node->GetTitle()) {
       model_->SetTitle(node, new_title);
@@ -435,7 +435,7 @@ std::string BookmarkBubbleGtk::GetTitle() {
     return std::string();
   }
 
-  return UTF16ToUTF8(node->GetTitle());
+  return base::UTF16ToUTF8(node->GetTitle());
 }
 
 void BookmarkBubbleGtk::ShowEditor() {
@@ -473,7 +473,7 @@ void BookmarkBubbleGtk::InitFolderComboModel() {
   for (int i = 0; i < folder_combo_model_->GetItemCount(); ++i) {
     const bool is_separator = folder_combo_model_->IsItemSeparatorAt(i);
     const std::string name = is_separator ?
-        std::string() : UTF16ToUTF8(folder_combo_model_->GetItemAt(i));
+        std::string() : base::UTF16ToUTF8(folder_combo_model_->GetItemAt(i));
 
     GtkTreeIter iter;
     gtk_list_store_append(store, &iter);