Poll PAC scripts for content changes.

net/proxy/mock_proxy_script_fetcher.cc

Index: net/proxy/mock_proxy_script_fetcher.cc
diff --git a/net/proxy/mock_proxy_script_fetcher.cc b/net/proxy/mock_proxy_script_fetcher.cc
index 9aeab1c450d5edf9d15aff326bbd6181b7c1f879..1e45c00fe90f2fa0a1bdde53554c0cd47f529a58 100644
--- a/net/proxy/mock_proxy_script_fetcher.cc
+++ b/net/proxy/mock_proxy_script_fetcher.cc
@@ -5,6 +5,7 @@
 #include "net/proxy/mock_proxy_script_fetcher.h"
 
 #include "base/logging.h"
+#include "base/message_loop.h"
 #include "base/string16.h"
 #include "base/utf_string_conversions.h"
 #include "net/base/net_errors.h"
@@ -12,7 +13,8 @@
 namespace net {
 
 MockProxyScriptFetcher::MockProxyScriptFetcher()
-    : pending_request_text_(NULL) {
+    : pending_request_text_(NULL),
+      waiting_for_fetch_(false) {
 }
 
 MockProxyScriptFetcher::~MockProxyScriptFetcher() {}
@@ -26,6 +28,10 @@ int MockProxyScriptFetcher::Fetch(const GURL& url, string16* text,
   pending_request_url_ = url;
   pending_request_callback_ = callback;
   pending_request_text_ = text;
+
+  if (waiting_for_fetch_)
+    MessageLoop::current()->Quit();
+
   return ERR_IO_PENDING;
 }
 
@@ -53,4 +59,11 @@ bool MockProxyScriptFetcher::has_pending_request() const {
   return !pending_request_callback_.is_null();
 }
 
+void MockProxyScriptFetcher::WaitUntilFetch() {
+  DCHECK(!has_pending_request());
+  waiting_for_fetch_ = true;
+  MessageLoop::current()->Run();
+  waiting_for_fetch_ = false;
+}
+
 }  // namespace net