aura: Replace UI-feature GYP flags with switches.

ash/shell.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 "ash/shell.h"
 
 #include <algorithm>
 
 #include "ash/accelerators/accelerator_controller.h"
 #include "ash/accelerators/accelerator_filter.h"
@@ skipping 255 matching lines @@
   aura::client::SetTooltipClient(tooltip_controller_.get());
 
   drag_drop_controller_.reset(new internal::DragDropController);
   power_button_controller_.reset(new PowerButtonController);
   video_detector_.reset(new VideoDetector);
   window_cycle_controller_.reset(new WindowCycleController);
 }
 
 Shell::WindowMode Shell::ComputeWindowMode(const gfx::Size& monitor_size,
                                            CommandLine* command_line) const {
+  if (command_line->HasSwitch(switches::kAuraForceCompactWindowMode))
+    return COMPACT_MODE;
+
   // If user set the flag, use their desired behavior.
   if (command_line->HasSwitch(switches::kAuraWindowMode)) {
     std::string mode =
         command_line->GetSwitchValueASCII(switches::kAuraWindowMode);
     if (mode == switches::kAuraWindowModeNormal)
       return NORMAL_MODE;
     if (mode == switches::kAuraWindowModeCompact)
       return COMPACT_MODE;
   }
 
@@ skipping 141 matching lines @@
   default_container->SetLayoutManager(
       new internal::DefaultContainerLayoutManager(
           workspace_controller_->workspace_manager()));
 }
 
 void Shell::ResetLayoutManager(int container_id) {
   GetContainer(container_id)->SetLayoutManager(NULL);
 }
 
 }  // namespace ash