Sheriff: Disable PlatformUtilTest.OpenFolder on Linux due to crashes and timeouts

TBR=blundell@chromium.org
TBR=droger@chromium.org
TBR=treib@chromium.org
TBR=vasilii@chromium.org

Bug: 1004639
Change-Id: I6785f8f26b6bb34bd2e9e56d121f3a8df49498e4
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1808624Reviewed-by: Fergus Dall <sidereal@google.com>
Cr-Commit-Position: refs/heads/master@{#697106}

chrome/browser/platform_util_unittest.cc

@@ -213,7 +213,13 @@ TEST_F(PlatformUtilTest, OpenFile) {
   EXPECT_EQ(OPEN_FAILED_PATH_NOT_FOUND, CallOpenItem(nowhere_, OPEN_FILE));
 }
 
-TEST_F(PlatformUtilTest, OpenFolder) {
+// TODO(crbug.com/1004639) Disabled on Linux due to crashes and timeouts.
+#if defined(OS_LINUX)
+#define MAYBE_OpenFolder DISABLED_OpenFolder
+#else
+#define MAYBE_OpenFolder OpenFolder
+#endif
+TEST_F(PlatformUtilTest, MAYBE_OpenFolder) {
   EXPECT_EQ(OPEN_SUCCEEDED, CallOpenItem(existing_folder_, OPEN_FOLDER));
   EXPECT_EQ(OPEN_FAILED_INVALID_TYPE,
             CallOpenItem(existing_file_, OPEN_FOLDER));