Change MANUAL -> DISABLED for ScreenCapturerIntegrationTest tests

It turns out MANUAL_ isn't a part of the supported gtest prefixes: it's a part of the
Chromium test launcher: https://cs.chromium.org/chromium/src/content/public/test/test_launcher.cc?rcl=0&l=69

Luckily, we can use DISABLED_ for the same purpose, since there's the --gtest_also_run_disabled_tests
flag we can use.

BUG=webrtc:6666, webrtc:6843
TBR=zijiehe@chromium.org

Review-Url: https://codereview.webrtc.org/2568013002 .
Cr-Commit-Position: refs/heads/master@{#15539}
diff --git a/webrtc/modules/desktop_capture/screen_capturer_integration_test.cc b/webrtc/modules/desktop_capture/screen_capturer_integration_test.cc
index b6821c2..28d780e 100644
--- a/webrtc/modules/desktop_capture/screen_capturer_integration_test.cc
+++ b/webrtc/modules/desktop_capture/screen_capturer_integration_test.cc
@@ -287,7 +287,7 @@
 #if defined(WEBRTC_WIN)
 // ScreenCapturerWinGdi randomly returns blank screen, the root cause is still
 // unknown. Bug, https://bugs.chromium.org/p/webrtc/issues/detail?id=6843.
-#define MAYBE_CaptureUpdatedRegion MANUAL_CaptureUpdatedRegion
+#define MAYBE_CaptureUpdatedRegion DISABLED_CaptureUpdatedRegion
 #else
 #define MAYBE_CaptureUpdatedRegion CaptureUpdatedRegion
 #endif
@@ -298,7 +298,7 @@
 #if defined(WEBRTC_WIN)
 // ScreenCapturerWinGdi randomly returns blank screen, the root cause is still
 // unknown. Bug, https://bugs.chromium.org/p/webrtc/issues/detail?id=6843.
-#define MAYBE_TwoCapturers MANUAL_TwoCapturers
+#define MAYBE_TwoCapturers DISABLED_TwoCapturers
 #else
 #define MAYBE_TwoCapturers TwoCapturers
 #endif