Gtk3 ui: Add libgtk3ui as a separate build component

chrome/browser/ui/libgtkui/select_file_dialog_impl.cc

Index: chrome/browser/ui/libgtkui/select_file_dialog_impl.cc
diff --git a/chrome/browser/ui/libgtk2ui/select_file_dialog_impl.cc b/chrome/browser/ui/libgtkui/select_file_dialog_impl.cc
similarity index 96%
rename from chrome/browser/ui/libgtk2ui/select_file_dialog_impl.cc
rename to chrome/browser/ui/libgtkui/select_file_dialog_impl.cc
index ce9ac3e764960e577daeee0fe868836ff925fb23..6a95ee0487853215ccb65248d6865a79682ae672 100644
--- a/chrome/browser/ui/libgtk2ui/select_file_dialog_impl.cc
+++ b/chrome/browser/ui/libgtkui/select_file_dialog_impl.cc
@@ -4,7 +4,7 @@
 //
 // This file implements common select dialog functionality between GTK and KDE.
 
-#include "chrome/browser/ui/libgtk2ui/select_file_dialog_impl.h"
+#include "chrome/browser/ui/libgtkui/select_file_dialog_impl.h"
 
 #include "base/environment.h"
 #include "base/files/file_util.h"
@@ -26,7 +26,7 @@ UseKdeFileDialogStatus use_kde_ = UNKNOWN;
 
 }  // namespace
 
-namespace libgtk2ui {
+namespace libgtkui {
 
 base::FilePath* SelectFileDialogImpl::last_saved_path_ = NULL;
 base::FilePath* SelectFileDialogImpl::last_opened_path_ = NULL;
@@ -90,4 +90,4 @@ bool SelectFileDialogImpl::CallDirectoryExistsOnUIThread(
   return base::DirectoryExists(path);
 }
 
-}  // namespace libgtk2ui
+}  // namespace libgtkui