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

chrome/browser/io_thread.h

Index: chrome/browser/io_thread.h
===================================================================
--- chrome/browser/io_thread.h	(revision 106059)
+++ chrome/browser/io_thread.h	(working copy)
@@ -28,6 +28,12 @@
 class ListValue;
 }
 
+#if defined(OS_CHROMEOS)
+namespace chromeos {
+class ProxyConfigServiceImpl;
+}
+#endif  // defined(OS_CHROMEOS)
+
 namespace net {
 class CertVerifier;
 class CookieStore;
@@ -177,7 +183,11 @@
   // which gets posted by calling certain member functions of IOThread.
   scoped_ptr<net::ProxyConfigService> system_proxy_config_service_;
 
-  scoped_refptr<PrefProxyConfigTracker> pref_proxy_config_tracker_;
+#if defined(OS_CHROMEOS)
+  scoped_ptr<chromeos::ProxyConfigServiceImpl> pref_proxy_config_tracker_;
+#else
+  scoped_ptr<PrefProxyConfigTracker> pref_proxy_config_tracker_;
+#endif  // defined(OS_CHROMEOS)
 
   scoped_refptr<net::URLRequestContextGetter>
       system_url_request_context_getter_;