Clip Views textfield drag images to selected text.

ui/gfx/render_text.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_GFX_RENDER_TEXT_H_
 #define UI_GFX_RENDER_TEXT_H_
 
 #include <algorithm>
 #include <cstring>
 #include <string>
@@ skipping 331 matching lines @@
   // offset from the top of |display_rect_| to the text baseline, in pixels.
   // The baseline is determined from the font list and display rect, and does
   // not depend on the text.
   int GetBaseline();
 
   void Draw(Canvas* canvas);
 
   // Draws a cursor at |position|.
   void DrawCursor(Canvas* canvas, const SelectionModel& position);
 
-  // Draw the selected text without a cursor or selection highlight. Subpixel
-  // antialiasing is disabled and foreground color is forced to black.
-  void DrawSelectedTextForDrag(Canvas* canvas);
-
   // Gets the SelectionModel from a visual point in local coordinates.
   virtual SelectionModel FindCursorPosition(const Point& point) = 0;
 
   // Return true if cursor can appear in front of the character at |position|,
   // which means it is a grapheme boundary or the first character in the text.
   virtual bool IsCursorablePosition(size_t position) = 0;
 
   // Get the visual bounds of a cursor at |caret|. These bounds typically
   // represent a vertical line if |insert_mode| is true. Pass false for
   // |insert_mode| to retrieve the bounds of the associated glyph. These bounds
@@ skipping 318 matching lines @@
   // Lines computed by EnsureLayout. These should be invalidated with
   // ResetLayout and on |display_rect_| changes.
   std::vector<internal::Line> lines_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderText);
 };
 
 }  // namespace gfx
 
 #endif  // UI_GFX_RENDER_TEXT_H_