Disable all the tests that are flaking more than 5% on Windows builders.

chrome/installer/util/work_item_list_unittest.cc

Index: chrome/installer/util/work_item_list_unittest.cc
diff --git a/chrome/installer/util/work_item_list_unittest.cc b/chrome/installer/util/work_item_list_unittest.cc
index 06719946f55debde041e71ab10e31d320d639937..857987f6b0ba270345129ba51a8b072fe144bd34 100644
--- a/chrome/installer/util/work_item_list_unittest.cc
+++ b/chrome/installer/util/work_item_list_unittest.cc
@@ -51,7 +51,8 @@ class WorkItemListTest : public testing::Test {
 }  // namespace
 
 // Execute a WorkItem list successfully and then rollback.
-TEST_F(WorkItemListTest, ExecutionSuccess) {
+// http://crbug.com/396405
+TEST_F(WorkItemListTest, DISABLED_ExecutionSuccess) {
   scoped_ptr<WorkItemList> work_item_list(WorkItem::CreateWorkItemList());
   scoped_ptr<WorkItem> work_item;
 
@@ -232,7 +233,8 @@ TEST_F(WorkItemListTest, ConditionalExecutionSuccess) {
   EXPECT_FALSE(base::PathExists(top_dir_to_create));
 }
 
-TEST_F(WorkItemListTest, ConditionalExecutionConditionFailure) {
+// http://crbug.com/396405
+TEST_F(WorkItemListTest, DISABLED_ConditionalExecutionConditionFailure) {
   scoped_ptr<WorkItemList> work_item_list(WorkItem::CreateWorkItemList());
   scoped_ptr<WorkItem> work_item;