buildbot mac: re-enable top half of suspect suites

Bisecting the linked bug.

TBR=jbudorick@chromium.org

Bug: 828031
Change-Id: Ia93130623463909ee7898965b782a82bf19a69a1
Reviewed-on: https://chromium-review.googlesource.com/1035104Reviewed-by: Elly Fong-Jones <ellyjones@chromium.org>
Commit-Queue: Elly Fong-Jones <ellyjones@chromium.org>
Cr-Commit-Position: refs/heads/master@{#554781}

testing/buildbot/filters/mac_window_server_killers.browser_tests.filter

 # https://crbug.com/828031
 
 # Suites implicated in window_server deaths.
--PDFExtensionTest.*
--SubresourceFilterBrowserTest.*
--DevToolsBeforeUnloadTest.*
--PushMessagingBrowserTest.*
--TaskManagerBrowserTest.*
--AppBannerManagerBrowserTest.*
--SpellingMenuObserverTest.*
--PluginPowerSaverBrowserTest.*
--SubresourceFilterPopupBrowserTest.*
--FindInPageControllerTest.*
--TestStatsDictionaryTest.*
--PlatformAppWithFileBrowserTest.*
--PermissionDialogTest.*
--SecurityStateTabHelperTest.*
--PrerenderBrowserTest.*
--DomDistillerViewerSourceBrowserTest.*
--PredictorBrowserTest.*
--TabManagerTest.*
--PasswordManagerBrowserTestBase.*
+# -PDFExtensionTest.*
+# -SubresourceFilterBrowserTest.*
+# -DevToolsBeforeUnloadTest.*
+# -PushMessagingBrowserTest.*
+# -TaskManagerBrowserTest.*
+# -AppBannerManagerBrowserTest.*
+# -SpellingMenuObserverTest.*
+# -PluginPowerSaverBrowserTest.*
+# -SubresourceFilterPopupBrowserTest.*
+# -FindInPageControllerTest.*
+# -TestStatsDictionaryTest.*
+# -PlatformAppWithFileBrowserTest.*
+# -PermissionDialogTest.*
+# -SecurityStateTabHelperTest.*
+# -PrerenderBrowserTest.*
+# -DomDistillerViewerSourceBrowserTest.*
+# -PredictorBrowserTest.*
+# -TabManagerTest.*
+# -PasswordManagerBrowserTestBase.*
 -DevToolsSanityTest.*
 -WebRtcBrowserTest.*
 -LoginPromptBrowserTest.*