ui::LocatedEvent location() returns gfx::PointF

ui/views/controls/tree/tree_view.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/views/controls/tree/tree_view.h"
 
 #include <algorithm>
 
 #include "base/i18n/rtl.h"
 #include "base/message_loop/message_loop.h"
@@ skipping 624 matching lines @@
 
 bool TreeView::OnClickOrTap(const ui::LocatedEvent& event) {
   CommitEdit();
   RequestFocus();
 
   int row = (event.y() - kVerticalInset) / row_height_;
   int depth = 0;
   InternalNode* node = GetNodeByRow(row, &depth);
   if (node) {
     gfx::Rect bounds(GetBoundsForNodeImpl(node, row, depth));
-    if (bounds.Contains(event.location())) {
+    if (bounds.Contains(gfx::ToFlooredPoint(event.location()))) {
       int relative_x = event.x() - bounds.x();
       if (base::i18n::IsRTL())
         relative_x = bounds.width() - relative_x;
       if (relative_x < kArrowRegionSize &&
           model_->GetChildCount(node->model_node())) {
         if (node->is_expanded())
           Collapse(node->model_node());
         else
           Expand(node->model_node());
       } else if (relative_x > kArrowRegionSize) {
@@ skipping 379 matching lines @@
   if (!is_expanded_)
     return max_width;
   for (int i = 0; i < child_count(); ++i) {
     max_width = std::max(max_width,
                          GetChild(i)->GetMaxWidth(indent, depth + 1));
   }
   return max_width;
 }
 
 }  // namespace views