Make the v8 Isolate used in the proxy resolver explicit.

chrome/browser/net/proxy_service_factory.cc

Index: chrome/browser/net/proxy_service_factory.cc
diff --git a/chrome/browser/net/proxy_service_factory.cc b/chrome/browser/net/proxy_service_factory.cc
index 06046a76fdee91bdc5d7025b8fec40925e8fec96..eead8df17788888e44dd1d27d69bb86bd0787a0a 100644
--- a/chrome/browser/net/proxy_service_factory.cc
+++ b/chrome/browser/net/proxy_service_factory.cc
@@ -75,6 +75,7 @@ net::ProxyService* ProxyServiceFactory::CreateProxyService(
     net::NetLog* net_log,
     net::URLRequestContext* context,
     net::ProxyConfigService* proxy_config_service,
+    v8::Isolate* v8_default_isolate,
     const CommandLine& command_line) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
 
@@ -123,7 +124,8 @@ net::ProxyService* ProxyServiceFactory::CreateProxyService(
         dhcp_factory.Create(context),
         context->host_resolver(),
         net_log,
-        context->network_delegate());
+        context->network_delegate(),
+        v8_default_isolate);
 #endif  // defined(OS_IOS)
   } else {
     proxy_service = net::ProxyService::CreateUsingSystemProxyResolver(