Fix gesture handling for Views textfields

ui/gfx/render_text.cc

 // 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.
 
 #include "ui/gfx/render_text.h"
 
 #include <algorithm>
 #include <climits>
 
 #include "base/command_line.h"
@@ skipping 874 matching lines @@
   int max_offset = 0;
   if (extra_content > 0) {
     switch (horizontal_alignment_) {
       case ALIGN_LEFT:
         min_offset = -extra_content;
         break;
       case ALIGN_RIGHT:
         max_offset = extra_content;
         break;
       case ALIGN_CENTER:
-        min_offset = -extra_content / 2;
+        min_offset = -(extra_content + 1) / 2;

[sky, 2014/07/21 22:37:43]

Why do you need to do this change?

[mohsen, 2014/07/21 23:07:56]

This is an off-by-one pixel bug I had in my previous CL (r282308). I'm fixing it
in a separate CL (crrev.com/384953003). I included it in here so that this CL
works properly before the other one lands.

Removed it since it is not really part of this CL.

         max_offset = extra_content / 2;
         break;
       default:
         break;
     }
   }
   if (horizontal_offset < min_offset)
     horizontal_offset = min_offset;
   else if (horizontal_offset > max_offset)
     horizontal_offset = max_offset;
@@ skipping 447 matching lines @@
   cursor_bounds_ += delta_offset;
 }
 
 void RenderText::DrawSelection(Canvas* canvas) {
   const std::vector<Rect> sel = GetSubstringBounds(selection());
   for (std::vector<Rect>::const_iterator i = sel.begin(); i < sel.end(); ++i)
     canvas->FillRect(*i, selection_background_focused_color_);
 }
 
 }  // namespace gfx