Use container::back() and container::pop_back() in ui/

ui/views/layout/grid_layout.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/layout/grid_layout.h"
 
 #include <algorithm>
 
 #include "base/logging.h"
 #include "base/macros.h"
@@ skipping 919 matching lines @@
     UpdateRemainingHeightFromRows(view_state);
 
     // Distribute the remaining height.
     DistributeRemainingHeight(view_state);
   }
 
   // Update the location of each of the rows.
   LayoutElement::CalculateLocationsFromSize(&rows_);
 
   // We now know the preferred height, set it here.
-  pref->set_height(rows_[rows_.size() - 1]->Location() +
-      rows_[rows_.size() - 1]->Size() + insets_.height());
+  pref->set_height(rows_.back()->Location() + rows_.back()->Size() +
+                   insets_.height());
 
   if (layout && height != pref->height()) {
     // We're doing a layout, and the height differs from the preferred height,
     // divy up the extra space.
     LayoutElement::DistributeDelta(height - pref->height(), &rows_);
 
     // Reset y locations.
     LayoutElement::CalculateLocationsFromSize(&rows_);
   }
 }
@@ skipping 103 matching lines @@
 
 ColumnSet* GridLayout::GetLastValidColumnSet() {
   for (int i = current_row_ - 1; i >= 0; --i) {
     if (rows_[i]->column_set())
       return rows_[i]->column_set();
   }
   return NULL;
 }
 
 }  // namespace views