Fix integration tests in src/chrome and src/extensions so that we can turn on IO thread checks wi...

chrome/browser/history/redirect_browsertest.cc

Index: chrome/browser/history/redirect_browsertest.cc
diff --git a/chrome/browser/history/redirect_browsertest.cc b/chrome/browser/history/redirect_browsertest.cc
index 781bee2935b938244ca36cc023f5bc3c216c78bd..ba0e687c1cbb78d699d88641b957b34d4ca6f793 100644
--- a/chrome/browser/history/redirect_browsertest.cc
+++ b/chrome/browser/history/redirect_browsertest.cc
@@ -21,6 +21,7 @@
 #include "base/task/cancelable_task_tracker.h"
 #include "base/test/test_timeouts.h"
 #include "base/threading/platform_thread.h"
+#include "base/threading/thread_restrictions.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "chrome/browser/history/history_service_factory.h"
 #include "chrome/browser/profiles/profile.h"
@@ -133,6 +134,7 @@ IN_PROC_BROWSER_TEST_F(RedirectTest, ClientEmptyReferer) {
       final_url.spec().c_str());
 
   // Write the contents to a temporary file.
+  base::ThreadRestrictions::ScopedAllowIO allow_io;
   base::ScopedTempDir temp_directory;
   ASSERT_TRUE(temp_directory.CreateUniqueTempDir());
   base::FilePath temp_file;