Handle extension webrequest API on the IO thread. This speeds up blocking event

chrome/browser/profiles/profile.cc

Index: chrome/browser/profiles/profile.cc
diff --git a/chrome/browser/profiles/profile.cc b/chrome/browser/profiles/profile.cc
index 03f01130783c1a47a25112e4b05a2e8a5225a70f..b61febd8e34485facc1feacbd6ac4094a8a40a4e 100644
--- a/chrome/browser/profiles/profile.cc
+++ b/chrome/browser/profiles/profile.cc
@@ -81,6 +81,18 @@ net::URLRequestContextGetter* Profile::default_request_context_;
 
 namespace {
 
+void NotifyOTRProfileCreatedOnIOThread(ProfileId original_profile_id,
+                                       ProfileId otr_profile_id) {
+  ExtensionWebRequestEventRouter::GetInstance()->OnOTRProfileCreated(
+      original_profile_id, otr_profile_id);
+}
+
+void NotifyOTRProfileDestroyedOnIOThread(ProfileId original_profile_id,
+                                         ProfileId otr_profile_id) {
+  ExtensionWebRequestEventRouter::GetInstance()->OnOTRProfileDestroyed(
+      original_profile_id, otr_profile_id);
+}
+
 }  // namespace
 
 Profile::Profile()
@@ -231,6 +243,12 @@ class OffTheRecordProfileImpl : public Profile,
     // Make the chrome//extension-icon/ resource available.
     ExtensionIconSource* icon_source = new ExtensionIconSource(real_profile);
     GetChromeURLDataManager()->AddDataSource(icon_source);
+
+    BrowserThread::PostTask(
+    BrowserThread::IO, FROM_HERE,
+    NewRunnableFunction(
+        &NotifyOTRProfileCreatedOnIOThread,
+        profile_->GetRuntimeId(), GetRuntimeId()));
   }
 
   virtual ~OffTheRecordProfileImpl() {
@@ -240,6 +258,12 @@ class OffTheRecordProfileImpl : public Profile,
 
     ProfileDependencyManager::GetInstance()->DestroyProfileServices(this);
 
+    BrowserThread::PostTask(
+        BrowserThread::IO, FROM_HERE,
+        NewRunnableFunction(
+            &NotifyOTRProfileDestroyedOnIOThread,
+            profile_->GetRuntimeId(), GetRuntimeId()));
+
     // Clean up all DB files/directories
     if (db_tracker_)
       BrowserThread::PostTask(