Disable flaky WebRtcInternalsPerfBrowserTest on Windows.

chrome/browser/media/webrtc/webrtc_internals_perf_browsertest.cc

 // Copyright 2014 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 <memory>
 
 #include "base/command_line.h"
 #include "base/files/file_util.h"
 #include "base/json/json_reader.h"
 #include "base/macros.h"
@@ skipping 219 matching lines @@
 }
 
 IN_PROC_BROWSER_TEST_F(
     WebRtcInternalsPerfBrowserTest,
     MANUAL_RunsAudioVideoCall60SecsAndLogsInternalMetricsVp9) {
   RunsAudioVideoCall60SecsAndLogsInternalMetrics("VP9");
 }
 
 #if BUILDFLAG(RTC_USE_H264)
 
+// Flaky on Windows, crbug.com/703579.
+#if defined(OS_WIN)
+#define MAYBE_MANUAL_RunsAudioVideoCall60SecsAndLogsInternalMetricsH264 \
+  DISABLED_MANUAL_RunsAudioVideoCall60SecsAndLogsInternalMetricsH264
+#else
+#define MAYBE_MANUAL_RunsAudioVideoCall60SecsAndLogsInternalMetricsH264 \
+  MANUAL_RunsAudioVideoCall60SecsAndLogsInternalMetricsH264
+#endif
 IN_PROC_BROWSER_TEST_F(
     WebRtcInternalsPerfBrowserTest,
-    MANUAL_RunsAudioVideoCall60SecsAndLogsInternalMetricsH264) {
+    MAYBE_MANUAL_RunsAudioVideoCall60SecsAndLogsInternalMetricsH264) {
   // Only run test if run-time feature corresponding to |rtc_use_h264| is on.
   if (!base::FeatureList::IsEnabled(content::kWebRtcH264WithOpenH264FFmpeg)) {
     LOG(WARNING) << "Run-time feature WebRTC-H264WithOpenH264FFmpeg disabled. "
         "Skipping WebRtcInternalsPerfBrowserTest."
         "MANUAL_RunsAudioVideoCall60SecsAndLogsInternalMetricsH264 (test "
         "\"OK\")";
     return;
   }
   RunsAudioVideoCall60SecsAndLogsInternalMetrics("H264");
 }
 
 #endif  // BUILDFLAG(RTC_USE_H264)
 
 IN_PROC_BROWSER_TEST_F(
     WebRtcInternalsPerfBrowserTest,
     MANUAL_RunsOneWayCall60SecsAndLogsInternalMetricsDefault) {
   RunsOneWayCall60SecsAndLogsInternalMetrics("", false);
 }
 
 IN_PROC_BROWSER_TEST_F(
     WebRtcInternalsPerfBrowserTest,
     MANUAL_RunsOneWayCall60SecsAndLogsInternalMetricsWithOpusDtx) {
   RunsOneWayCall60SecsAndLogsInternalMetrics("", true);
 }