[Sheriff] Disable SaveAsMHTML on Linux Tests (dbg)

TBR=benwells@chromium.org

Bug: 1017305
Change-Id: Ia6d3f44d2b9fbe139192e8057167063aefcee7f1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1875386Reviewed-by: Stephen McGruer <smcgruer@chromium.org>
Commit-Queue: Stephen McGruer <smcgruer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#708713}

chrome/browser/extensions/api/page_capture/page_capture_apitest.cc

@@ -5,6 +5,7 @@
 #include "base/base_switches.h"
 #include "base/command_line.h"
 #include "base/threading/thread_restrictions.h"
+#include "build/build_config.h"
 #include "chrome/browser/extensions/active_tab_permission_granter.h"
 #include "chrome/browser/extensions/api/page_capture/page_capture_api.h"
 #include "chrome/browser/extensions/extension_action_runner.h"
@@ -67,15 +68,21 @@ class PageCaptureSaveAsMHTMLDelegate
 
 // TODO(crbug.com/961017): Fix memory leaks in tests and re-enable on LSAN.
 #ifdef LEAK_SANITIZER
-#define MAYBE_SaveAsMHTML DISABLED_SaveAsMHTML
 #define MAYBE_SaveAsMHTMLWithActiveTabWithFileAccess \
   DISABLED_SaveAsMHTMLWithActiveTabWithFileAccess
 #else
-#define MAYBE_SaveAsMHTML SaveAsMHTML
 #define MAYBE_SaveAsMHTMLWithActiveTabWithFileAccess \
   SaveAsMHTMLWithActiveTabWithFileAccess
 #endif
 
+// TODO(crbug.com/961017): Fix memory leaks in tests and re-enable on LSAN.
+// Also flaky-failing on Linux Tests (dbg): https://crbug.com/1017305
+#if defined(LEAK_SANITIZER) || (defined(OS_LINUX) && !defined(NDEBUG))
+#define MAYBE_SaveAsMHTML DISABLED_SaveAsMHTML
+#else
+#define MAYBE_SaveAsMHTML SaveAsMHTML
+#endif
+
 IN_PROC_BROWSER_TEST_F(ExtensionPageCaptureApiTest, MAYBE_SaveAsMHTML) {
   ASSERT_TRUE(StartEmbeddedTestServer());
   PageCaptureSaveAsMHTMLDelegate delegate;