Add TextRange and related methods to Textfield Views.

views/controls/textfield/native_textfield_gtk.h

Index: views/controls/textfield/native_textfield_gtk.h
diff --git a/views/controls/textfield/native_textfield_gtk.h b/views/controls/textfield/native_textfield_gtk.h
index afbb154832c9b18f32f029b63af7eac35d3cb61d..9f2d1f7dd1213b0dd1e29a2f0e4a2443f8d14264 100644
--- a/views/controls/textfield/native_textfield_gtk.h
+++ b/views/controls/textfield/native_textfield_gtk.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2009 The Chromium Authors. All rights reserved.
+// 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.
 
@@ -48,6 +48,9 @@ class NativeTextfieldGtk : public NativeControlGtk,
   virtual View* GetView();
   virtual gfx::NativeView GetTestingHandle() const;
   virtual bool IsIMEComposing() const;
+  virtual void GetSelectedRange(TextRange* range) const;
+  virtual void SelectRange(const TextRange& range);
+  virtual size_t GetCursorPosition() const;
   virtual bool HandleKeyPressed(const views::KeyEvent& e);
   virtual bool HandleKeyReleased(const views::KeyEvent& e);
   virtual void HandleWillGainFocus();