MacViews: Implement Force Touch/Mac dictionary lookup for Textfields.

ui/views/controls/textfield/textfield_model.h

 // 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.
 
 #ifndef UI_VIEWS_CONTROLS_TEXTFIELD_TEXTFIELD_MODEL_H_
 #define UI_VIEWS_CONTROLS_TEXTFIELD_TEXTFIELD_MODEL_H_
 
 #include <stddef.h>
 
 #include <list>
@@ skipping 187 matching lines @@
 
   // 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 base::string16& new_text,
                                       size_t position);
 
   // Retrieves the text content in a given range.
-  base::string16 GetTextFromRange(const gfx::Range& range) const;
+  base::string16 GetTextFromRange(const gfx::Range& range) const {
+    return render_text_->GetTextFromRange(range);
+  }
 
   // Retrieves the range containing all text in the model.
   void GetTextRange(gfx::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
   // 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.
@@ skipping 91 matching lines @@
   //   2) new edit is added. (redo history is cleared)
   //   3) redone all undone edits.
   EditHistory::iterator current_edit_;
 
   DISALLOW_COPY_AND_ASSIGN(TextfieldModel);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_CONTROLS_TEXTFIELD_TEXTFIELD_MODEL_H_