Disable SelectFileDialogMacTest.MultipleDialogs.

Failing on Mac10.10.

TBR=thakis@chromium.org

Change-Id: I906d7ffe323f10630a21ec93f953b40c33fb0182
Bug: 852536
Reviewed-on: https://chromium-review.googlesource.com/1099715Reviewed-by: John Budorick <jbudorick@chromium.org>
Commit-Queue: John Budorick <jbudorick@chromium.org>
Cr-Commit-Position: refs/heads/master@{#567034}

ui/shell_dialogs/select_file_dialog_mac_unittest.mm

@@ -419,7 +419,7 @@ TEST_F(SelectFileDialogMacTest, DialogMessage) {
 }
 
 // Verify that multiple file dialogs are corrected handled.
-TEST_F(SelectFileDialogMacTest, MultipleDialogs) {
+TEST_F(SelectFileDialogMacTest, DISABLED_MultipleDialogs) {
   FileDialogArguments args(GetDefaultArguments());
   SelectFileWithParams(args);
   SelectFileWithParams(args);