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

ui/base/gtk/menu_label_accelerator_util_unittest.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // 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/basictypes.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
-namespace gfx {
+namespace ui {
 
 TEST(LinuxUtilTest, ConvertAcceleratorsFromWindowsStyle) {
   static const struct {
     const char* input;
     const char* output;
   } cases[] = {
     { "", "" },
     { "nothing", "nothing" },
     { "foo &bar", "foo _bar" },
     { "foo &&bar", "foo &bar" },
@@ skipping 44 matching lines @@
     { "foo_&_bar", "foo_&&_bar" },
     { "&_foo_bar_&", "&&_foo_bar_&&" },
   };
 
   for (size_t i = 0; i < ARRAYSIZE_UNSAFE(cases); ++i) {
     std::string result = EscapeWindowsStyleAccelerators(cases[i].input);
     EXPECT_EQ(cases[i].output, result);
   }
 }
 
-}  // namespace gfx
+}  // namespace ui