AU: Full proxy support

This CL Introduces a new proxy resolver that queries Chrome browser
for all URLs. This means the updater now works with Proxy
AutoConfiguration (PAC) files and automatic proxy detection.

BUG=chromium-os:9478
TEST=performed update, unittests

Review URL: http://codereview.chromium.org/6594025

Change-Id: I2c169aec06109e3eabc4011e0b536685dfd13f79
diff --git a/update_attempter.h b/update_attempter.h
index 1709a3a..0afe7f6 100644
--- a/update_attempter.h
+++ b/update_attempter.h
@@ -16,7 +16,7 @@
 #include <gtest/gtest_prod.h>  // for FRIEND_TEST
 
 #include "update_engine/action_processor.h"
-#include "update_engine/chrome_proxy_resolver.h"
+#include "update_engine/chrome_browser_proxy_resolver.h"
 #include "update_engine/download_action.h"
 #include "update_engine/omaha_request_params.h"
 #include "update_engine/omaha_response_handler_action.h"
@@ -235,7 +235,7 @@
 
   // Our two proxy resolvers
   DirectProxyResolver direct_proxy_resolver_;
-  ChromeProxyResolver chrome_proxy_resolver_;
+  ChromeBrowserProxyResolver chrome_proxy_resolver_;
 
   DISALLOW_COPY_AND_ASSIGN(UpdateAttempter);
 };