Views: Extract text selection code from Textfield.

ui/views/controls/textfield/textfield_model.cc

 // Copyright 2014 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/views/controls/textfield/textfield_model.h"
 
 #include <algorithm>
 
 #include "base/logging.h"
 #include "base/macros.h"
@@ skipping 413 matching lines @@
       return render_text_->SelectRange(range);
     return render_text_->MoveCursorTo(
         gfx::SelectionModel(cursor.caret_pos(), cursor.caret_affinity()));
   }
   return render_text_->MoveCursorTo(cursor);
 }
 
 bool TextfieldModel::MoveCursorTo(const gfx::Point& point, bool select) {
   if (HasCompositionText())
     ConfirmCompositionText();
-  gfx::SelectionModel cursor = render_text_->FindCursorPosition(point);
-  if (select)
-    cursor.set_selection_start(render_text_->selection().start());
-  return render_text_->MoveCursorTo(cursor);
+  return render_text_->MoveCursorTo(point, select);
 }
 
 base::string16 TextfieldModel::GetSelectedText() const {
   return GetTextFromRange(render_text_->selection());
 }
 
 void TextfieldModel::SelectRange(const gfx::Range& range) {
   if (HasCompositionText())
     ConfirmCompositionText();
   render_text_->SelectRange(range);
@@ skipping 403 matching lines @@
   render_text_->SetCursorPosition(new_cursor_pos);
   // TODO(oshima): Select text that was just undone, like Mac (but not GTK).
 }
 
 // static
 void TextfieldModel::ClearKillBuffer() {
   SetKillBuffer(base::string16());
 }
 
 }  // namespace views