Add TextRange and related methods to Textfield Views.

views/controls/textfield/native_textfield_wrapper.h

Index: views/controls/textfield/native_textfield_wrapper.h
diff --git a/views/controls/textfield/native_textfield_wrapper.h b/views/controls/textfield/native_textfield_wrapper.h
index c45243e029ed891cc600dccea6cec3f212ec5833..e2ef2bd6545588df8a572d0f08830e9d5f2a71ac 100644
--- a/views/controls/textfield/native_textfield_wrapper.h
+++ b/views/controls/textfield/native_textfield_wrapper.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2010 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.
 
@@ -17,6 +17,7 @@ namespace views {
 
 class KeyEvent;
 class Textfield;
+class TextRange;
 class View;
 
 // An interface implemented by an object that provides a platform-native
@@ -91,6 +92,15 @@ class NativeTextfieldWrapper {
   // Returns whether or not an IME is composing text.
   virtual bool IsIMEComposing() const = 0;
 
+  // Gets the selected range.
+  virtual void GetSelectedRange(TextRange* range) const = 0;
+
+  // Selects the text given by |range|.
+  virtual void SelectRange(const TextRange& range) = 0;
+
+  // Returns the currnet cursor position.
+  virtual size_t GetCursorPosition() const = 0;
+
   // Following methods are to forward key/focus related events to the
   // views wrapper so that TextfieldViews can handle key inputs without
   // having focus.