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

chrome/browser/profiles/profile_browsertest.cc

Index: chrome/browser/profiles/profile_browsertest.cc
diff --git a/chrome/browser/profiles/profile_browsertest.cc b/chrome/browser/profiles/profile_browsertest.cc
index dd3f2bf98578faeba1fa6be180ded644d57c5401..20b97e601d15b19432433c41c727e2667446fc08 100644
--- a/chrome/browser/profiles/profile_browsertest.cc
+++ b/chrome/browser/profiles/profile_browsertest.cc
@@ -19,6 +19,7 @@
 #include "base/sequenced_task_runner.h"
 #include "base/synchronization/waitable_event.h"
 #include "base/task_scheduler/task_scheduler.h"
+#include "base/threading/thread_restrictions.h"
 #include "base/values.h"
 #include "base/version.h"
 #include "build/build_config.h"
@@ -342,6 +343,7 @@ class ProfileBrowserTest : public InProcessBrowserTest {
 // Test OnProfileCreate is called with is_new_profile set to true when
 // creating a new profile synchronously.
 IN_PROC_BROWSER_TEST_F(ProfileBrowserTest, CreateNewProfileSynchronous) {
+  base::ThreadRestrictions::ScopedAllowIO allow_io;
   base::ScopedTempDir temp_dir;
   ASSERT_TRUE(temp_dir.CreateUniqueTempDir());
 
@@ -367,6 +369,7 @@ IN_PROC_BROWSER_TEST_F(ProfileBrowserTest, CreateNewProfileSynchronous) {
 // Test OnProfileCreate is called with is_new_profile set to false when
 // creating a profile synchronously with an existing prefs file.
 IN_PROC_BROWSER_TEST_F(ProfileBrowserTest, CreateOldProfileSynchronous) {
+  base::ThreadRestrictions::ScopedAllowIO allow_io;
   base::ScopedTempDir temp_dir;
   ASSERT_TRUE(temp_dir.CreateUniqueTempDir());
   CreatePrefsFileInDirectory(temp_dir.GetPath());
@@ -388,6 +391,7 @@ IN_PROC_BROWSER_TEST_F(ProfileBrowserTest, CreateOldProfileSynchronous) {
 // creating a new profile asynchronously.
 IN_PROC_BROWSER_TEST_F(ProfileBrowserTest,
                        DISABLED_CreateNewProfileAsynchronous) {
+  base::ThreadRestrictions::ScopedAllowIO allow_io;
   base::ScopedTempDir temp_dir;
   ASSERT_TRUE(temp_dir.CreateUniqueTempDir());
 
@@ -422,6 +426,7 @@ IN_PROC_BROWSER_TEST_F(ProfileBrowserTest,
 // creating a profile asynchronously with an existing prefs file.
 IN_PROC_BROWSER_TEST_F(ProfileBrowserTest,
                        DISABLED_CreateOldProfileAsynchronous) {
+  base::ThreadRestrictions::ScopedAllowIO allow_io;
   base::ScopedTempDir temp_dir;
   ASSERT_TRUE(temp_dir.CreateUniqueTempDir());
   CreatePrefsFileInDirectory(temp_dir.GetPath());
@@ -448,6 +453,7 @@ IN_PROC_BROWSER_TEST_F(ProfileBrowserTest,
 // Flaky: http://crbug.com/393177
 // Test that a README file is created for profiles that didn't have it.
 IN_PROC_BROWSER_TEST_F(ProfileBrowserTest, DISABLED_ProfileReadmeCreated) {
+  base::ThreadRestrictions::ScopedAllowIO allow_io;
   base::ScopedTempDir temp_dir;
   ASSERT_TRUE(temp_dir.CreateUniqueTempDir());
 
@@ -475,6 +481,7 @@ IN_PROC_BROWSER_TEST_F(ProfileBrowserTest, DISABLED_ProfileReadmeCreated) {
 
 // Test that repeated setting of exit type is handled correctly.
 IN_PROC_BROWSER_TEST_F(ProfileBrowserTest, ExitType) {
+  base::ThreadRestrictions::ScopedAllowIO allow_io;
   base::ScopedTempDir temp_dir;
   ASSERT_TRUE(temp_dir.CreateUniqueTempDir());
 
@@ -566,6 +573,7 @@ void CompareURLRequestContexts(
 }  // namespace
 
 IN_PROC_BROWSER_TEST_F(ProfileBrowserTest, URLRequestContextIsolation) {
+  base::ThreadRestrictions::ScopedAllowIO allow_io;
   base::ScopedTempDir temp_dir;
   ASSERT_TRUE(temp_dir.CreateUniqueTempDir());
 
@@ -601,6 +609,7 @@ IN_PROC_BROWSER_TEST_F(ProfileBrowserTest, URLRequestContextIsolation) {
 
 IN_PROC_BROWSER_TEST_F(ProfileBrowserTest,
                        OffTheRecordURLRequestContextIsolation) {
+  base::ThreadRestrictions::ScopedAllowIO allow_io;
   base::ScopedTempDir temp_dir;
   ASSERT_TRUE(temp_dir.CreateUniqueTempDir());
 
@@ -666,6 +675,7 @@ std::string GetExitTypePreferenceFromDisk(Profile* profile) {
 
 IN_PROC_BROWSER_TEST_F(ProfileBrowserTest,
                        WritesProfilesSynchronouslyOnEndSession) {
+  base::ThreadRestrictions::ScopedAllowIO allow_io;
   base::ScopedTempDir temp_dir;
   ASSERT_TRUE(temp_dir.CreateUniqueTempDir());
 
@@ -777,6 +787,7 @@ IN_PROC_BROWSER_TEST_F(ProfileBrowserTest,
 // Verifies the cache directory supports multiple profiles when it's overriden
 // by group policy or command line switches.
 IN_PROC_BROWSER_TEST_F(ProfileBrowserTest, DiskCacheDirOverride) {
+  base::ThreadRestrictions::ScopedAllowIO allow_io;
   int size;
   const base::FilePath::StringPieceType profile_name =
       FILE_PATH_LITERAL("Profile 1");