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

chrome/browser/app_controller_mac_browsertest.mm

Index: chrome/browser/app_controller_mac_browsertest.mm
diff --git a/chrome/browser/app_controller_mac_browsertest.mm b/chrome/browser/app_controller_mac_browsertest.mm
index c0b4161b04087701b4f1a20b12f2992cf3a1ef43..1d46c37cd8c7cb4b481cfc28dc2643853904a06f 100644
--- a/chrome/browser/app_controller_mac_browsertest.mm
+++ b/chrome/browser/app_controller_mac_browsertest.mm
@@ -16,6 +16,7 @@
 #include "base/run_loop.h"
 #include "base/strings/sys_string_conversions.h"
 #include "base/strings/utf_string_conversions.h"
+#include "base/threading/thread_restrictions.h"
 #include "chrome/app/chrome_command_ids.h"
 #import "chrome/browser/app_controller_mac.h"
 #include "chrome/browser/apps/app_browsertest_util.h"
@@ -257,6 +258,7 @@ IN_PROC_BROWSER_TEST_F(AppControllerNewProfileManagementBrowserTest,
   base::scoped_nsobject<AppController> ac([[AppController alloc] init]);
 
   // Lock the active profile.
+  base::ThreadRestrictions::ScopedAllowIO allow_io;
   Profile* profile = [ac lastProfile];
   ProfileAttributesEntry* entry;
   ASSERT_TRUE(g_browser_process->profile_manager()->
@@ -292,6 +294,7 @@ IN_PROC_BROWSER_TEST_F(AppControllerNewProfileManagementBrowserTest,
 
   base::scoped_nsobject<AppController> ac([[AppController alloc] init]);
 
+  base::ThreadRestrictions::ScopedAllowIO allow_io;
   Profile* profile = [ac lastProfile];
   EXPECT_EQ(ProfileManager::GetGuestProfilePath(), profile->GetPath());
   EXPECT_TRUE(profile->IsGuestSession());
@@ -326,6 +329,7 @@ IN_PROC_BROWSER_TEST_F(AppControllerNewProfileManagementBrowserTest,
   // Prohibiting guest mode forces the user manager flow for About Chrome.
   local_state->SetBoolean(prefs::kBrowserGuestModeEnabled, false);
 
+  base::ThreadRestrictions::ScopedAllowIO allow_io;
   Profile* guest_profile = [ac lastProfile];
   EXPECT_EQ(ProfileManager::GetGuestProfilePath(), guest_profile->GetPath());
   EXPECT_TRUE(guest_profile->IsGuestSession());
@@ -538,6 +542,7 @@ IN_PROC_BROWSER_TEST_F(AppControllerMainMenuBrowserTest,
       BookmarkModelFactory::GetForBrowserContext(profile1));
 
   // Create profile 2.
+  base::ThreadRestrictions::ScopedAllowIO allow_io;
   base::FilePath path2 = profile_manager->GenerateNextProfileDirectoryPath();
   Profile* profile2 =
       Profile::CreateProfile(path2, NULL, Profile::CREATE_MODE_SYNCHRONOUS);