[ios] Disables all HistorySearchViewControllerTests.

Bug: 888107
TBR: sczs@chromium.org
Cq-Include-Trybots: luci.chromium.try:ios-simulator-cronet;luci.chromium.try:ios-simulator-full-configs
Change-Id: I6a75a2d96039d3cc3ef177799d02a32f6ea87851
Reviewed-on: https://chromium-review.googlesource.com/1240162
Commit-Queue: Justin Cohen <justincohen@chromium.org>
Reviewed-by: Justin Cohen <justincohen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#593524}

ios/chrome/browser/ui/history/history_search_view_controller_unittest.mm

@@ -52,7 +52,7 @@ TEST_F(HistorySearchViewControllerTest, DISABLED_CancelButtonPressed) {
 // Test that invocation of
 // textField:shouldChangeCharactersInRange:replacementString: on the text field
 // delegate results invokes delegate callback to request search.
-TEST_F(HistorySearchViewControllerTest, SearchButtonPressed) {
+TEST_F(HistorySearchViewControllerTest, DISABLED_SearchButtonPressed) {
   UITextField* text_field =
       base::mac::ObjCCastStrict<HistorySearchView>(search_view_controller_.view)
           .textField;
@@ -67,7 +67,7 @@ TEST_F(HistorySearchViewControllerTest, SearchButtonPressed) {
 
 // Test that disabling HistorySearchViewController disables the search view text
 // field.
-TEST_F(HistorySearchViewControllerTest, DisableSearchBar) {
+TEST_F(HistorySearchViewControllerTest, DISABLED_DisableSearchBar) {
   UITextField* text_field =
       base::mac::ObjCCastStrict<HistorySearchView>(search_view_controller_.view)
           .textField;