Allow use of container cbegin() and cend() methods, plus sample uses.

chrome/browser/ui/views/toolbar/browser_actions_container.cc

 // Copyright 2013 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 "chrome/browser/ui/views/toolbar/browser_actions_container.h"
 
 #include <utility>
 
 #include "base/compiler_specific.h"
 #include "base/stl_util.h"
@@ skipping 580 matching lines @@
   state->role = ui::AX_ROLE_GROUP;
   state->name = l10n_util::GetStringUTF16(IDS_ACCNAME_EXTENSIONS);
 }
 
 void BrowserActionsContainer::WriteDragDataForView(View* sender,
                                                    const gfx::Point& press_pt,
                                                    OSExchangeData* data) {
   toolbar_actions_bar_->OnDragStarted();
   DCHECK(data);
 
-  ToolbarActionViews::iterator iter = std::find(toolbar_action_views_.begin(),
-                                                toolbar_action_views_.end(),
-                                                sender);
-  DCHECK(iter != toolbar_action_views_.end());
-  ToolbarActionViewController* view_controller = (*iter)->view_controller();
+  auto it = std::find(toolbar_action_views_.cbegin(),
+                      toolbar_action_views_.cend(), sender);
+  DCHECK(it != toolbar_action_views_.cend());
+  ToolbarActionViewController* view_controller = (*it)->view_controller();
   gfx::Size size(ToolbarActionsBar::IconWidth(false),
                  ToolbarActionsBar::IconHeight());
   drag_utils::SetDragImageOnDataObject(
       view_controller->GetIcon(GetCurrentWebContents(), size).AsImageSkia(),
       press_pt.OffsetFromOrigin(),
       data);
   // Fill in the remaining info.
   BrowserActionDragData drag_data(view_controller->GetId(),
-                                  iter - toolbar_action_views_.begin());
+                                  it - toolbar_action_views_.cbegin());
   drag_data.Write(browser_->profile(), data);
 }
 
 int BrowserActionsContainer::GetDragOperationsForView(View* sender,
                                                       const gfx::Point& p) {
   return ui::DragDropTypes::DRAG_MOVE;
 }
 
 bool BrowserActionsContainer::CanStartDragForView(View* sender,
                                                   const gfx::Point& press_pt,
@@ skipping 163 matching lines @@
   warning_highlight_painter_.reset(
       views::Painter::CreateImageGridPainter(kWarningImages));
 }
 
 void BrowserActionsContainer::ClearActiveBubble(views::Widget* widget) {
   DCHECK(active_bubble_);
   DCHECK_EQ(active_bubble_->GetWidget(), widget);
   widget->RemoveObserver(this);
   active_bubble_ = nullptr;
 }