Add support to ProxyService for downloading a PAC script on behalf of the Pro...

chrome/browser/net/resolve_proxy_msg_helper_unittest.cc

 // Copyright (c) 2009 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.
 
 #include "chrome/browser/net/resolve_proxy_msg_helper.h"
 
 #include "base/waitable_event.h"
 #include "net/base/net_errors.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 // This ProxyConfigService always returns "http://pac" as the PAC url to use.
 class MockProxyConfigService: public net::ProxyConfigService {
  public:
   virtual int GetProxyConfig(net::ProxyConfig* results) {
     results->pac_url = GURL("http://pac");
     return net::OK;
   }
 };
 
 // This PAC resolver always returns the hostname of the query URL as the
 // proxy to use. The Block() method will make GetProxyForURL() hang until
 // Unblock() is called.
 class MockProxyResolver : public net::ProxyResolver {
  public:
-  explicit MockProxyResolver() : event_(false, false), is_blocked_(false) {
+  MockProxyResolver() : ProxyResolver(true), event_(false, false),
+                        is_blocked_(false) {
   }
 
   virtual int GetProxyForURL(const GURL& query_url,
                              const GURL& /*pac_url*/,
                              net::ProxyInfo* results) {
     if (is_blocked_)
       event_.Wait();
     results->UseNamedProxy(query_url.host());
     return net::OK;
   }
@@ skipping 304 matching lines @@
       result1->TimedWaitUntilDone(base::TimeDelta::FromMilliseconds(2)));
   EXPECT_FALSE(
       result2->TimedWaitUntilDone(base::TimeDelta::FromMilliseconds(2)));
   EXPECT_FALSE(
       result3->TimedWaitUntilDone(base::TimeDelta::FromMilliseconds(2)));
 
   // It should also be the case that msg1, msg2, msg3 were deleted by the
   // cancellation. (Else will show up as a leak in Purify).
 }