Dynamically refresh pref-configured proxies.

chrome/test/testing_profile.h

Index: chrome/test/testing_profile.h
diff --git a/chrome/test/testing_profile.h b/chrome/test/testing_profile.h
index dbfa2667ae1eea4313ede08754e27586551d8920..de7f32faffe01df0d15887a5dd6b0feed35e4542 100644
--- a/chrome/test/testing_profile.h
+++ b/chrome/test/testing_profile.h
@@ -294,6 +294,8 @@ class TestingProfile : public Profile {
   }
 #endif  // defined(OS_CHROMEOS)
 
+  virtual PrefProxyConfigTracker* GetProxyConfigTracker();
+
   // Schedules a task on the history backend and runs a nested loop until the
   // task is processed.  This has the effect of blocking the caller until the
   // history service processes all pending requests.
@@ -404,6 +406,9 @@ class TestingProfile : public Profile {
   // is disposed.
   scoped_refptr<ExtensionsService> extensions_service_;
 
+  // The proxy prefs tracker.
+  scoped_refptr<PrefProxyConfigTracker> pref_proxy_config_tracker_;
+
   // We use a temporary directory to store testing profile data.
   ScopedTempDir temp_dir_;
 };