Add support for ProxyResolverErrorObserver to ProxyResolverMojo.

net/proxy/proxy_resolver_mojo_unittest.cc

Index: net/proxy/proxy_resolver_mojo_unittest.cc
diff --git a/net/proxy/proxy_resolver_mojo_unittest.cc b/net/proxy/proxy_resolver_mojo_unittest.cc
index 62f87ec23c018cce72dd364e2616288b71d98689..49c2bf1989bed2bc9adf0e10982ee784b40765ff 100644
--- a/net/proxy/proxy_resolver_mojo_unittest.cc
+++ b/net/proxy/proxy_resolver_mojo_unittest.cc
@@ -22,6 +22,7 @@
 #include "net/proxy/mojo_proxy_resolver_factory.h"
 #include "net/proxy/mojo_proxy_type_converters.h"
 #include "net/proxy/proxy_info.h"
+#include "net/proxy/proxy_resolver_error_observer.h"
 #include "net/proxy/proxy_resolver_script_data.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "third_party/mojo/src/mojo/public/cpp/bindings/binding.h"
@@ -259,7 +260,8 @@ class TestMojoProxyResolverFactory : public MojoProxyResolverFactory {
 
   // Overridden from MojoProxyResolverFactory:
   void Create(mojo::InterfaceRequest<interfaces::ProxyResolver> req,
-              interfaces::HostResolverPtr host_resolver) override;
+              interfaces::HostResolverPtr host_resolver,
+              interfaces::ProxyResolverErrorObserverPtr error_handler) override;
 
   MockMojoProxyResolver& GetMockResolver() { return *mock_proxy_resolver_; }
 
@@ -287,7 +289,8 @@ TestMojoProxyResolverFactory::~TestMojoProxyResolverFactory() {
 
 void TestMojoProxyResolverFactory::Create(
     mojo::InterfaceRequest<interfaces::ProxyResolver> req,
-    interfaces::HostResolverPtr host_resolver) {
+    interfaces::HostResolverPtr host_resolver,
+    interfaces::ProxyResolverErrorObserverPtr error_handler) {
   if (fail_next_create_) {
     req = nullptr;
     fail_next_create_ = false;
@@ -362,7 +365,7 @@ class ProxyResolverMojoTest : public testing::Test {
  public:
   void SetUp() override {
     proxy_resolver_mojo_.reset(new ProxyResolverMojo(
-        &mojo_proxy_resolver_factory_, &mock_host_resolver_));
+        &mojo_proxy_resolver_factory_, &mock_host_resolver_, nullptr));
   }
 
   scoped_ptr<Request> MakeRequest(const GURL& url) {