Disabled three flaky cronet tests.

components/cronet/url_request_context_config_unittest.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "components/cronet/url_request_context_config.h"
 
 #include "base/memory/ptr_util.h"
 #include "base/message_loop/message_loop.h"
 #include "base/values.h"
 #include "net/cert/cert_verifier.h"
 #include "net/http/http_network_session.h"
 #include "net/log/net_log.h"
 #include "net/log/net_log_with_source.h"
 #include "net/proxy/proxy_config.h"
 #include "net/proxy/proxy_config_service_fixed.h"
 #include "net/url_request/url_request_context.h"
 #include "net/url_request/url_request_context_builder.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace cronet {
 
-TEST(URLRequestContextConfigTest, TestExperimentalOptionParsing) {
+// Test is flaky. See https://crbug.com/737326.
+TEST(URLRequestContextConfigTest, DISABLED_TestExperimentalOptionParsing) {
   URLRequestContextConfig config(
       // Enable QUIC.
       true,
       // QUIC User Agent ID.
       "Default QUIC User Agent ID",
       // Enable SPDY.
       true,
       // Enable SDCH.
       false,
       // Enable Brotli.
@@ skipping 70 matching lines @@
 
   // Check IPv6 is disabled when on wifi.
   EXPECT_TRUE(context->host_resolver()->GetNoIPv6OnWifi());
 
   net::HostResolver::RequestInfo info(net::HostPortPair("abcde", 80));
   net::AddressList addresses;
   EXPECT_EQ(net::OK, context->host_resolver()->ResolveFromCache(
                          info, &addresses, net::NetLogWithSource()));
 }
 
-TEST(URLRequestContextConfigTest, SetQuicConnectionMigrationOptions) {
+// Test is flaky. See https://crbug.com/737326.
+TEST(URLRequestContextConfigTest, DISABLED_SetQuicConnectionMigrationOptions) {
   URLRequestContextConfig config(
       // Enable QUIC.
       true,
       // QUIC User Agent ID.
       "Default QUIC User Agent ID",
       // Enable SPDY.
       true,
       // Enable SDCH.
       false,
       // Enable Brotli.
@@ skipping 34 matching lines @@
       context->GetNetworkSessionParams();
 
   EXPECT_FALSE(params->quic_close_sessions_on_ip_change);
   EXPECT_TRUE(params->quic_migrate_sessions_on_network_change);
   EXPECT_TRUE(params->quic_migrate_sessions_early);
 }
 
 // See stale_host_resolver_unittest.cc for test of StaleDNS options.
 
 }  // namespace cronet