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

extensions/browser/guest_view/web_view/web_view_apitest.cc

Index: extensions/browser/guest_view/web_view/web_view_apitest.cc
diff --git a/extensions/browser/guest_view/web_view/web_view_apitest.cc b/extensions/browser/guest_view/web_view/web_view_apitest.cc
index 6206dd126d5f9b38f92ff6ede01423ffca341007..aef32e9ebe832fdc8ffd9c1d2bb9370aa7c82bd7 100644
--- a/extensions/browser/guest_view/web_view/web_view_apitest.cc
+++ b/extensions/browser/guest_view/web_view/web_view_apitest.cc
@@ -11,6 +11,7 @@
 #include "base/path_service.h"
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
+#include "base/threading/thread_restrictions.h"
 #include "build/build_config.h"
 #include "components/guest_view/browser/guest_view_manager.h"
 #include "components/guest_view/browser/guest_view_manager_delegate.h"
@@ -138,6 +139,7 @@ WebViewAPITest::WebViewAPITest() {
 }
 
 void WebViewAPITest::LaunchApp(const std::string& app_location) {
+  base::ThreadRestrictions::ScopedAllowIO allow_io;
   base::FilePath test_data_dir;
   PathService::Get(DIR_TEST_DATA, &test_data_dir);
   test_data_dir = test_data_dir.AppendASCII(app_location.c_str());
@@ -203,6 +205,7 @@ void WebViewAPITest::StartTestServer(const std::string& app_location) {
 
   test_config_.SetInteger(kTestServerPort, embedded_test_server()->port());
 
+  base::ThreadRestrictions::ScopedAllowIO allow_io;
   base::FilePath test_data_dir;
   PathService::Get(DIR_TEST_DATA, &test_data_dir);
   test_data_dir = test_data_dir.AppendASCII(app_location.c_str());