Disable flaky WebRtcInternalsPerfBrowserTest on Windows.

chrome/browser/media/webrtc/webrtc_internals_perf_browsertest.cc

Index: chrome/browser/media/webrtc/webrtc_internals_perf_browsertest.cc
diff --git a/chrome/browser/media/webrtc/webrtc_internals_perf_browsertest.cc b/chrome/browser/media/webrtc/webrtc_internals_perf_browsertest.cc
index 7b5f6ddac60e3034eab58427d409a099e738b0f2..beb8f6b5285e64f09c23cb045bd5797a7f4fab65 100644
--- a/chrome/browser/media/webrtc/webrtc_internals_perf_browsertest.cc
+++ b/chrome/browser/media/webrtc/webrtc_internals_perf_browsertest.cc
@@ -237,9 +237,17 @@ IN_PROC_BROWSER_TEST_F(
 
 #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. "