Implement STYLE_LOWERCASE style for Aura NativeTextfield.

ui/views/controls/textfield/textfield_views_model.h

 // 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.
 
 #ifndef UI_VIEWS_CONTROLS_TEXTFIELD_TEXTFIELD_VIEWS_MODEL_H_
 #define UI_VIEWS_CONTROLS_TEXTFIELD_TEXTFIELD_VIEWS_MODEL_H_
 #pragma once
 
 #include <list>
 #include <vector>
@@ skipping 167 matching lines @@
 
   // Cuts the currently selected text and puts it to clipboard. Returns true
   // if text has changed after cutting.
   bool Cut();
 
   // Copies the currently selected text and puts it to clipboard. Returns true
   // if something was copied to the clipboard.
   bool Copy();
 
   // Pastes text from the clipboard at current cursor position. Returns true
-  // if text has changed after pasting.
+  // if any text is pasted.
   bool Paste();
 
   // Tells if any text is selected, even if the selection is in composition
   // text.
   bool HasSelection() const;
 
   // Deletes the selected text. This method shouldn't be called with
   // composition text.
   void DeleteSelection();
 
   // Deletes the selected text (if any) and insert text at given
   // position.
   void DeleteSelectionAndInsertTextAt(
       const string16& text, size_t position);
 
   // Retrieves the text content in a given range.
   string16 GetTextFromRange(const ui::Range& range) const;
 
   // Retrieves the range containing all text in the model.
   void GetTextRange(ui::Range* range) const;
 
   // Sets composition text and attributes. If there is composition text already,
-  // it’ll be replaced by the new one. Otherwise, current selection will be
+  // it'll be replaced by the new one. Otherwise, current selection will be
   // replaced. If there is no selection, the composition text will be inserted
   // at the insertion point.
   // Any changes to the model except text insertion will confirm the current
   // composition text.
   void SetCompositionText(const ui::CompositionText& composition);
 
   // Converts current composition text into final content.
   void ConfirmCompositionText();
 
   // Removes current composition text.
@@ skipping 83 matching lines @@
   // 2) new edit is added. (redo history is cleared)
   // 3) redone all undone edits.
   EditHistory::iterator current_edit_;
 
   DISALLOW_COPY_AND_ASSIGN(TextfieldViewsModel);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_CONTROLS_TEXTFIELD_TEXTFIELD_VIEWS_MODEL_H_