Make callers of CommandLine use it via the base:: namespace.

content/browser/frame_host/frame_tree_node.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 "content/browser/frame_host/frame_tree_node.h"
 
 #include <queue>
 
 #include "base/command_line.h"
 #include "base/stl_util.h"
@@ skipping 19 matching lines @@
       render_manager_(this,
                       render_frame_delegate,
                       render_view_delegate,
                       render_widget_delegate,
                       manager_delegate),
       frame_tree_node_id_(next_frame_tree_node_id_++),
       frame_name_(name),
       parent_(NULL) {}
 
 FrameTreeNode::~FrameTreeNode() {
-  if (CommandLine::ForCurrentProcess()->HasSwitch(
-      switches::kEnableBrowserSideNavigation)) {
+  if (base::CommandLine::ForCurrentProcess()->HasSwitch(
+          switches::kEnableBrowserSideNavigation)) {
     navigator_->CancelNavigation(this);
   }
 }
 
 bool FrameTreeNode::IsMainFrame() const {
   return frame_tree_->root() == this;
 }
 
 void FrameTreeNode::AddChild(scoped_ptr<FrameTreeNode> child,
                              int process_id,
@@ skipping 38 matching lines @@
   current_frame_host()->set_render_frame_created(false);
 
   // The children may not have been cleared if a cross-process navigation
   // commits before the old process cleans everything up.  Make sure the child
   // nodes get deleted before swapping to a new process.
   ScopedVector<FrameTreeNode> old_children = children_.Pass();
   old_children.clear();  // May notify observers.
 }
 
 }  // namespace content