[Media Router] Disable two more flaky tests.

Disables two more tests found to be flaky.

TBR=zhaobin

Bug: 822231
Change-Id: I0c6a36a7d448e942ffd191ea12471f33c2729c81
Reviewed-on: https://chromium-review.googlesource.com/966983Reviewed-by: mark a. foltz <mfoltz@chromium.org>
Commit-Queue: mark a. foltz <mfoltz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#543780}

chrome/test/media_router/media_router_integration_browsertest.cc

@@ -827,7 +827,9 @@ IN_PROC_BROWSER_TEST_F(MediaRouterIntegrationBrowserTest, Fail_CreateRoute) {
   CheckStartFailed(web_contents, "UnknownError", "Unknown sink");
 }
 
-IN_PROC_BROWSER_TEST_F(MediaRouterIntegrationBrowserTest, ReconnectSession) {
+// TODO(crbug.com/822231): Flaky in Chromium waterfall.
+IN_PROC_BROWSER_TEST_F(MediaRouterIntegrationBrowserTest,
+                       MANUAL_ReconnectSession) {
   RunReconnectSessionTest();
 }
 

chrome/test/media_router/media_router_one_ua_integration_browsertest.cc

@@ -99,6 +99,7 @@ IN_PROC_BROWSER_TEST_F(MediaRouterIntegrationOneUANoReceiverBrowserTest,
   RunFailToSendMessageTest();
 }
 
+// TODO(crbug.com/822231): Flaky in Chromium waterfall.
 IN_PROC_BROWSER_TEST_F(MediaRouterIntegrationOneUANoReceiverBrowserTest,
                        ReconnectSession) {
   RunReconnectSessionTest();