Eliminate usage of InterfacePtr::WaitForIncomingResponse.

net/proxy/proxy_resolver_factory_mojo_unittest.cc

Index: net/proxy/proxy_resolver_factory_mojo_unittest.cc
diff --git a/net/proxy/proxy_resolver_factory_mojo_unittest.cc b/net/proxy/proxy_resolver_factory_mojo_unittest.cc
index da9ac3367e5a2aac2f5dc2ccff37693adc685b1b..75b2d2241b7a898e9f38f8a108d3b7c5b49f4b08 100644
--- a/net/proxy/proxy_resolver_factory_mojo_unittest.cc
+++ b/net/proxy/proxy_resolver_factory_mojo_unittest.cc
@@ -14,6 +14,7 @@
 
 #include "base/bind.h"
 #include "base/memory/ptr_util.h"
+#include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
 #include "base/stl_util.h"
 #include "base/values.h"
@@ -272,7 +273,12 @@ void MockMojoProxyResolver::GetProxyForUrl(
       break;
     }
     case GetProxyForUrlAction::WAIT_FOR_CLIENT_DISCONNECT: {
-      ASSERT_FALSE(client.WaitForIncomingResponse());
+      base::MessageLoop::ScopedNestableTaskAllower nestable_allower(
+          base::MessageLoop::current());
+      base::RunLoop run_loop;
+      client.set_connection_error_handler(run_loop.QuitClosure());
+      run_loop.Run();
+      ASSERT_TRUE(client.encountered_error());
       break;
     }
     case GetProxyForUrlAction::MAKE_DNS_REQUEST: {
@@ -435,7 +441,12 @@ void MockMojoProxyResolverFactory::CreateResolver(
       break;
     }
     case CreateProxyResolverAction::WAIT_FOR_CLIENT_DISCONNECT: {
-      ASSERT_FALSE(client.WaitForIncomingResponse());
+      base::MessageLoop::ScopedNestableTaskAllower nestable_allower(
+          base::MessageLoop::current());
+      base::RunLoop run_loop;
+      client.set_connection_error_handler(run_loop.QuitClosure());
+      run_loop.Run();
+      ASSERT_TRUE(client.encountered_error());
       break;
     }
     case CreateProxyResolverAction::MAKE_DNS_REQUEST: {