Move some common ime code to ui/base/

ui/base/gtk/gtk_im_context_util.h

Index: ui/base/gtk/gtk_im_context_util.h
diff --git a/ui/base/gtk/gtk_im_context_util.h b/ui/base/gtk/gtk_im_context_util.h
new file mode 100644
index 0000000000000000000000000000000000000000..dd560a970018139e4d05d953bbc1a9486534fa19
--- /dev/null
+++ b/ui/base/gtk/gtk_im_context_util.h
@@ -0,0 +1,24 @@
+// Copyright (c) 2011 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.
+
+#ifndef UI_BASE_GTK_GTK_IM_CONTEXT_UTIL_H_
+#define UI_BASE_GTK_GTK_IM_CONTEXT_UTIL_H_
+#pragma once
+
+#include <pango/pango-attributes.h>
+
+namespace ui {
+
+struct CompositionText;
+
+// Extracts composition text information (text, underlines, selection range)
+// from given Gtk preedit data (utf-8 text, pango attributes, cursor position).
+void ExtractCompositionTextFromGtkPreedit(const gchar* utf8_text,
+                                          PangoAttrList* attrs,
+                                          int cursor_position,
+                                          CompositionText* composition);
+
+}  // namespace ui
+
+#endif  // UI_BASE_GTK_GTK_IM_CONTEXT_UTIL_H_