Disable SessionRestoreTest.MemoryPressureLoadsNotAllTabs on CrOS

TBR=sky@chromium.org
NOTRY=true

Bug: 860111
Change-Id: Ida98cb932b4caf9ffb60622a293dfd2da6b5c29d
Reviewed-on: https://chromium-review.googlesource.com/1125540Reviewed-by: Makoto Shimazu <shimazu@chromium.org>
Commit-Queue: Makoto Shimazu <shimazu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#572451}

chrome/browser/sessions/session_restore_browsertest.cc

@@ -939,7 +939,15 @@ IN_PROC_BROWSER_TEST_F(SessionRestoreTest, NoMemoryPressureLoadsAllTabs) {
       tab_strip_model->GetWebContentsAt(2)->GetRenderWidgetHostView());
 }
 
-IN_PROC_BROWSER_TEST_F(SessionRestoreTest, MemoryPressureLoadsNotAllTabs) {
+// Disable on CrOS since it's flaky: crbug.com/860111.
+#if defined(OS_CHROMEOS)
+#define MAYBE_MemoryPressureLoadsNotAllTabs \
+  DISABLED_MemoryPressureLoadsNotAllTabs
+#else
+#define MAYBE_MemoryPressureLoadsNotAllTabs MemoryPressureLoadsNotAllTabs
+#endif
+IN_PROC_BROWSER_TEST_F(SessionRestoreTest,
+                       MAYBE_MemoryPressureLoadsNotAllTabs) {
   // Add several tabs to the browser. Restart the browser and check that all
   // tabs got loaded properly.
   ui_test_utils::NavigateToURLWithDisposition(