Use a utility process for the Mojo v8 proxy resolver.

net/proxy/proxy_service_unittest.cc

Index: net/proxy/proxy_service_unittest.cc
diff --git a/net/proxy/proxy_service_unittest.cc b/net/proxy/proxy_service_unittest.cc
index 84ce1010207699e6444ec9743d9e904eef5bf73d..8ad6b937c98d17269ac550023304a19b5dbcefab 100644
--- a/net/proxy/proxy_service_unittest.cc
+++ b/net/proxy/proxy_service_unittest.cc
@@ -3083,6 +3083,147 @@ TEST_F(ProxyServiceTest, PACScriptRefetchAfterActivity) {
   EXPECT_TRUE(info3.is_direct());
 }
 
+// This tests the polling of the PAC script. Specifically, it tests that

[Sam McNally, 2015/03/09 03:36:15]

Copy-paste?

[Anand Mistry (off Chromium), 2015/03/10 07:24:24]

Done.

+// polling occurs in response to user activity.
+TEST_F(ProxyServiceTest, PACScriptRefetchAfterTerminatedResolveProxy) {
+  ProxyConfig config(
+      ProxyConfig::CreateFromCustomPacURL(GURL("http://foopy/proxy.pac")));
+  config.set_pac_mandatory(true);
+  MockProxyConfigService* config_service = new MockProxyConfigService(config);
+
+  MockAsyncProxyResolverExpectsBytes* resolver =
+      new MockAsyncProxyResolverExpectsBytes;
+
+  ProxyService service(config_service, resolver, NULL);
+
+  MockProxyScriptFetcher* fetcher = new MockProxyScriptFetcher;
+  service.SetProxyScriptFetchers(fetcher,
+                                 new DoNothingDhcpProxyScriptFetcher());
+
+  // Start 1 request.
+  ProxyInfo info1;
+  TestCompletionCallback callback1;
+  int rv =
+      service.ResolveProxy(GURL("http://request1"), net::LOAD_NORMAL, &info1,
+                           callback1.callback(), NULL, NULL, BoundNetLog());
+  EXPECT_EQ(ERR_IO_PENDING, rv);
+
+  // The first request should have triggered initial download of PAC script.
+  EXPECT_TRUE(fetcher->has_pending_request());
+  EXPECT_EQ(GURL("http://foopy/proxy.pac"), fetcher->pending_request_url());
+
+  // Nothing has been sent to the resolver yet.
+  EXPECT_TRUE(resolver->pending_requests().empty());
+
+  // At this point the ProxyService should be waiting for the
+  // ProxyScriptFetcher to invoke its completion callback, notifying it of
+  // PAC script download completion.
+  fetcher->NotifyFetchCompletion(OK, kValidPacScript1);
+
+  // Now that the PAC script is downloaded, the request will have been sent to
+  // the proxy resolver.
+  EXPECT_EQ(ASCIIToUTF16(kValidPacScript1),
+            resolver->pending_set_pac_script_request()->script_data()->utf16());
+  resolver->pending_set_pac_script_request()->CompleteNow(OK);
+
+  ASSERT_EQ(1u, resolver->pending_requests().size());
+  EXPECT_EQ(GURL("http://request1"), resolver->pending_requests()[0]->url());
+
+  // Complete the pending request.
+  resolver->pending_requests()[0]->results()->UseNamedProxy("request1:80");
+  resolver->pending_requests()[0]->CompleteNow(OK);
+
+  // Wait for completion callback, and verify that the request ran as expected.
+  EXPECT_EQ(OK, callback1.WaitForResult());
+  EXPECT_EQ("request1:80", info1.proxy_server().ToURI());
+
+  // At this point we have initialized the proxy service using a PAC script.
+  // Our PAC poller is set to update ONLY in response to network activity,
+  // (i.e. another call to ResolveProxy()).
+
+  ASSERT_FALSE(fetcher->has_pending_request());
+  ASSERT_TRUE(resolver->pending_requests().empty());
+
+  // Start a second request and third request.
+  ProxyInfo info2;
+  TestCompletionCallback callback2;
+  rv = service.ResolveProxy(GURL("http://request2"), net::LOAD_NORMAL, &info2,
+                            callback2.callback(), NULL, NULL, BoundNetLog());
+  EXPECT_EQ(ERR_IO_PENDING, rv);
+
+  ProxyInfo info3;
+  TestCompletionCallback callback3;
+  rv = service.ResolveProxy(GURL("http://request3"), net::LOAD_NORMAL, &info3,
+                            callback3.callback(), NULL, NULL, BoundNetLog());
+  EXPECT_EQ(ERR_IO_PENDING, rv);
+
+  // Fail request 2 with ERR_PAC_SCRIPT_TERMINATED, which indicates the PAC
+  // script has terminated fatally and needs to be reloaded. Request 3's resolve
+  // request should be cancelled, but ProxyService keeps it and retries it
+  // later.
+  ASSERT_EQ(2u, resolver->pending_requests().size());
+  EXPECT_EQ(GURL("http://request2"), resolver->pending_requests()[0]->url());
+  EXPECT_EQ(GURL("http://request3"), resolver->pending_requests()[1]->url());
+  resolver->pending_requests()[0]->CompleteNow(ERR_PAC_SCRIPT_TERMINATED);
+  EXPECT_EQ(ERR_MANDATORY_PROXY_CONFIGURATION_FAILED,
+            callback2.WaitForResult());
+
+  ASSERT_EQ(0u, resolver->pending_requests().size());
+  ASSERT_EQ(1u, resolver->cancelled_requests().size());
+
+  // Since there's an active request, the proxy script should automatically be
+  // re-fetched.
+  EXPECT_TRUE(fetcher->has_pending_request());
+  fetcher->NotifyFetchCompletion(OK, kValidPacScript1);
+  EXPECT_EQ(ASCIIToUTF16(kValidPacScript1),
+            resolver->pending_set_pac_script_request()->script_data()->utf16());
+  resolver->pending_set_pac_script_request()->CompleteNow(OK);
+  ASSERT_EQ(1u, resolver->pending_requests().size());
+  EXPECT_EQ(GURL("http://request3"), resolver->pending_requests()[0]->url());
+  resolver->pending_requests()[0]->results()->UseNamedProxy("request3:80");
+  resolver->pending_requests()[0]->CompleteNow(OK);
+
+  EXPECT_EQ(OK, callback3.WaitForResult());
+
+  // Do another request which fails with ERR_PAC_SCRIPT_TERMINATED. This time,
+  // there are no pending requests, so don't re-fetch the script until the next
+  // request comes in.
+  ProxyInfo info4;
+  TestCompletionCallback callback4;
+  rv = service.ResolveProxy(GURL("http://request4"), net::LOAD_NORMAL, &info4,
+                            callback4.callback(), NULL, NULL, BoundNetLog());
+  EXPECT_EQ(ERR_IO_PENDING, rv);
+  ASSERT_EQ(1u, resolver->pending_requests().size());
+  resolver->pending_requests()[0]->CompleteNow(ERR_PAC_SCRIPT_TERMINATED);
+
+  // There should be no automatic fetch request this time.
+  EXPECT_FALSE(fetcher->has_pending_request());
+
+  // Now, the next request should cause a fetch.
+  ProxyInfo info5;
+  TestCompletionCallback callback5;
+  rv = service.ResolveProxy(GURL("http://request5"), net::LOAD_NORMAL, &info5,
+                            callback5.callback(), NULL, NULL, BoundNetLog());
+  EXPECT_EQ(ERR_IO_PENDING, rv);
+  // No pending requests to the resolver since a script fetch is in progress.
+  EXPECT_TRUE(resolver->pending_requests().empty());
+
+  // Now there should be a PAC script fetch.
+  EXPECT_TRUE(fetcher->has_pending_request());
+
+  // Finish and verify.
+  fetcher->NotifyFetchCompletion(OK, kValidPacScript1);
+  EXPECT_EQ(ASCIIToUTF16(kValidPacScript1),
+            resolver->pending_set_pac_script_request()->script_data()->utf16());
+  resolver->pending_set_pac_script_request()->CompleteNow(OK);
+  ASSERT_EQ(1u, resolver->pending_requests().size());
+  EXPECT_EQ(GURL("http://request5"), resolver->pending_requests()[0]->url());
+  resolver->pending_requests()[0]->results()->UseNamedProxy("request5:80");
+  resolver->pending_requests()[0]->CompleteNow(OK);
+  EXPECT_EQ(OK, callback5.WaitForResult());
+  EXPECT_EQ("request5:80", info5.proxy_server().ToURI());
+}
+
 // Test that the synchronous resolution fails when a PAC script is active.
 TEST_F(ProxyServiceTest, SynchronousWithPAC) {
   MockProxyConfigService* config_service =