redesign and reimplement proxy config service and tracker, revise proxy ui on cros

chrome/browser/ui/webui/options/chromeos/core_chromeos_options_handler.h

Index: chrome/browser/ui/webui/options/chromeos/core_chromeos_options_handler.h
===================================================================
--- chrome/browser/ui/webui/options/chromeos/core_chromeos_options_handler.h	(revision 106059)
+++ chrome/browser/ui/webui/options/chromeos/core_chromeos_options_handler.h	(working copy)
@@ -8,6 +8,8 @@
 
 #include "chrome/browser/ui/webui/options/core_options_handler.h"
 
+class PrefSetObserver;
+
 namespace chromeos {
 
 // CoreChromeOSOptionsHandler handles ChromeOS settings.
@@ -17,6 +19,7 @@
 
  protected:
   // ::CoreOptionsHandler overrides
+  virtual void Initialize();
   virtual Value* FetchPref(const std::string& pref_name);
   virtual void ObservePref(const std::string& pref_name);
   virtual void SetPref(const std::string& pref_name,
@@ -36,6 +39,8 @@
   // Keeps the track of change caused by the handler to make sure
   // it does not signal itself again.
   bool handling_change_;
+
+  scoped_ptr<PrefSetObserver> proxy_prefs_;
 };
 
 }  // namespace chromeos