Add persisted preference for projection touch HUD

chrome/browser/chromeos/preferences.h

 // 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.
 
 #ifndef CHROME_BROWSER_CHROMEOS_PREFERENCES_H_
 #define CHROME_BROWSER_CHROMEOS_PREFERENCES_H_
 
 #include <string>
 #include <vector>
 
+#include "ash/shell_observer.h"
 #include "base/compiler_specific.h"
 #include "base/prefs/pref_member.h"
 #include "chrome/browser/chromeos/language_preferences.h"
 #include "chrome/browser/prefs/pref_service_syncable_observer.h"
 
 class PrefRegistrySimple;
 class PrefService;
 class PrefServiceSyncable;
 
 namespace user_prefs {
 class PrefRegistrySyncable;
 }
 
 namespace chromeos {
 
 namespace input_method {
 class InputMethodManager;
 }
 
 // The Preferences class handles Chrome OS preferences. When the class
 // is first initialized, it will initialize the OS settings to what's stored in
 // the preferences. These include touchpad settings, etc.
 // When the preferences change, we change the settings to reflect the new value.
-class Preferences : public PrefServiceSyncableObserver {
+class Preferences : public PrefServiceSyncableObserver,
+                    public ash::ShellObserver {
  public:
   Preferences();
   explicit Preferences(
       input_method::InputMethodManager* input_method_manager);  // for testing
   virtual ~Preferences();
 
   // These method will register the prefs associated with Chrome OS settings.
   static void RegisterPrefs(PrefRegistrySimple* registry);
   static void RegisterProfilePrefs(user_prefs::PrefRegistrySyncable* registry);
 
@@ skipping 54 matching lines @@
   // underlying XKB API requires it.
   void UpdateAutoRepeatRate();
 
   // Force natural scroll to on if --enable-natural-scroll-default is specified
   // on the cmd line.
   void ForceNaturalScrollDefault();
 
   // PrefServiceSyncableObserver implementation.
   virtual void OnIsSyncingChanged() OVERRIDE;
 
+  // Overriden from ash::ShellObserver.
+  virtual void OnTouchHudProjectionToggled(bool enabled) OVERRIDE;
+
   PrefServiceSyncable* prefs_;
 
   input_method::InputMethodManager* input_method_manager_;
 
   BooleanPrefMember tap_to_click_enabled_;
   BooleanPrefMember tap_dragging_enabled_;
   BooleanPrefMember three_finger_click_enabled_;
   BooleanPrefMember natural_scroll_;
   BooleanPrefMember vert_edge_scroll_enabled_;
   BooleanPrefMember a11y_spoken_feedback_enabled_;
   BooleanPrefMember a11y_high_contrast_enabled_;
   BooleanPrefMember a11y_screen_magnifier_enabled_;
   IntegerPrefMember a11y_screen_magnifier_type_;
   DoublePrefMember a11y_screen_magnifier_scale_;
   IntegerPrefMember speed_factor_;
   IntegerPrefMember mouse_sensitivity_;
   IntegerPrefMember touchpad_sensitivity_;
   BooleanPrefMember primary_mouse_button_right_;
   BooleanPrefMember use_24hour_clock_;
   BooleanPrefMember disable_drive_;
   BooleanPrefMember disable_drive_over_cellular_;
   BooleanPrefMember disable_drive_hosted_files_;
   FilePathPrefMember download_default_directory_;
   FilePathPrefMember select_file_last_directory_;
   FilePathPrefMember save_file_default_directory_;
+  BooleanPrefMember touch_hud_projection_enabled_;
 
   // Input method preferences.
   StringPrefMember preferred_languages_;
   StringPrefMember preload_engines_;
   StringPrefMember current_input_method_;
   StringPrefMember previous_input_method_;
   StringPrefMember enabled_extension_imes_;
 
   BooleanPrefMember chewing_boolean_prefs_[
       language_prefs::kNumChewingBooleanPrefs];
@@ skipping 43 matching lines @@
   BooleanPrefMember power_allow_screen_wake_locks_;
   DoublePrefMember power_presentation_screen_dim_delay_factor_;
   DoublePrefMember power_user_activity_screen_dim_delay_factor_;
 
   DISALLOW_COPY_AND_ASSIGN(Preferences);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_PREFERENCES_H_