Disable remaining test on Mac that is flaking more than 5%.

Data from http://chromium-build-logs.appspot.com/flakiness_dashboard?master=chromium.mac.

BUG=386891,53586
R=viettrungluu@chromium.org

Review URL: https://codereview.chromium.org/415453002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@284945 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/ui/cocoa/browser_window_controller_unittest.mm

@@ -846,7 +846,8 @@ TEST_F(BrowserWindowFullScreenControllerTest, TestFullscreen) {
 // problem (such as a modal dialog up).  This tests is a very useful canary, so
 // please do not mark it as flaky without first verifying that there are no bot
 // problems.
-TEST_F(BrowserWindowFullScreenControllerTest, TestActivate) {
+// http://crbug.com/53586
+TEST_F(BrowserWindowFullScreenControllerTest, DISABLED_TestActivate) {
   [controller_ showWindow:nil];
 
   EXPECT_FALSE([controller_ isFullscreen]);