Change Interceptors into URLRequestJobFactory::ProtocolHandlers.

chrome/browser/printing/print_dialog_cloud_interative_uitest.cc

Index: chrome/browser/printing/print_dialog_cloud_interative_uitest.cc
diff --git a/chrome/browser/printing/print_dialog_cloud_interative_uitest.cc b/chrome/browser/printing/print_dialog_cloud_interative_uitest.cc
index 4f67ada09a035181dfa244ac8d42367a4ab5b9ef..fc328fa08f2efac20018bc508cc829039d80e2dd 100644
--- a/chrome/browser/printing/print_dialog_cloud_interative_uitest.cc
+++ b/chrome/browser/printing/print_dialog_cloud_interative_uitest.cc
@@ -173,8 +173,9 @@ class PrintDialogCloudTest : public InProcessBrowserTest {
 
   virtual void TearDown() {
     if (handler_added_) {
-      net::URLRequestFilter* filter = net::URLRequestFilter::GetInstance();
-      filter->RemoveHostnameHandler(scheme_, host_name_);
+      BrowserThread::PostTask(
+          BrowserThread::IO, FROM_HERE,
+          base::Bind(Unregister, scheme_, host_name_));
       handler_added_ = false;
       TestController::GetInstance()->set_delegate(NULL);
     }
@@ -187,14 +188,14 @@ class PrintDialogCloudTest : public InProcessBrowserTest {
   // individual test functions seems to fix that.
   void AddTestHandlers() {
     if (!handler_added_) {
-      net::URLRequestFilter* filter = net::URLRequestFilter::GetInstance();
       GURL cloud_print_service_url =
           CloudPrintURL(browser()->profile()).
           GetCloudPrintServiceURL();
       scheme_ = cloud_print_service_url.scheme();
       host_name_ = cloud_print_service_url.host();
-      filter->AddHostnameHandler(scheme_, host_name_,
-                                 &PrintDialogCloudTest::Factory);
+      BrowserThread::PostTask(
+          BrowserThread::IO, FROM_HERE,
+          base::Bind(&PrintDialogCloudTest::Register, this));
       handler_added_ = true;
 
       GURL cloud_print_dialog_url =
@@ -218,6 +219,17 @@ class PrintDialogCloudTest : public InProcessBrowserTest {
                    std::string("application/pdf"), false));
   }
 
+ private:
+  void Register() {
+    net::URLRequestFilter::GetInstance()->AddHostnameHandler(
+        scheme_, host_name_, &PrintDialogCloudTest::Factory);
+  }
+  static void Unregister(const std::string& scheme,
+                         const std::string& host_name) {
+    net::URLRequestFilter::GetInstance()->RemoveHostnameHandler(scheme,
+                                                                host_name);
+  }
+
   bool handler_added_;
   std::string scheme_;
   std::string host_name_;