linux: Move linux_util.h from gfx/ to ui/base/gtk.

ui/base/gtk/menu_label_accelerator_util.cc

Index: ui/base/gtk/menu_label_accelerator_util.cc
diff --git a/ui/gfx/linux_util.cc b/ui/base/gtk/menu_label_accelerator_util.cc
similarity index 95%
rename from ui/gfx/linux_util.cc
rename to ui/base/gtk/menu_label_accelerator_util.cc
index 8484e1b4452c43f56b5ab76688ff2ad04a8ddd87..f8192c56feffc5526f68974573307294b06dd03c 100644
--- a/ui/gfx/linux_util.cc
+++ b/ui/base/gtk/menu_label_accelerator_util.cc
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "ui/gfx/linux_util.h"
+#include "ui/base/gtk/menu_label_accelerator_util.h"
 
 #include "base/string_util.h"
 
@@ -39,7 +39,7 @@ std::string ConvertAmpersandsTo(const std::string& label,
 
 }  // namespace
 
-namespace gfx {
+namespace ui {
 
 std::string ConvertAcceleratorsFromWindowsStyle(const std::string& label) {
   return ConvertAmpersandsTo(label, "_");
@@ -59,4 +59,4 @@ std::string EscapeWindowsStyleAccelerators(const std::string& label) {
   return ret;
 }
 
-}  // namespace gfx
+}  // namespace ui