Add browser test for ChromeResourceDispatcherHostDelegate.

components/policy/core/common/cloud/policy_header_io_helper.cc

Index: components/policy/core/common/cloud/policy_header_io_helper.cc
diff --git a/components/policy/core/common/cloud/policy_header_io_helper.cc b/components/policy/core/common/cloud/policy_header_io_helper.cc
index a749dda4dc8f07236b4cbcbec9c7d42bdac42ba0..a5d15a2c80de90e06663816fe7e29ea77b5b1ade 100644
--- a/components/policy/core/common/cloud/policy_header_io_helper.cc
+++ b/components/policy/core/common/cloud/policy_header_io_helper.cc
@@ -7,15 +7,9 @@
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/sequenced_task_runner.h"
+#include "components/policy/core/common/cloud/cloud_policy_constants.h"
 #include "net/url_request/url_request.h"
 
-namespace {
-
-// The name of the header containing the policy information.
-const char kChromePolicyHeader[] = "Chrome-Policy-Posture";
-
-}  // namespace
-
 namespace policy {
 
 PolicyHeaderIOHelper::PolicyHeaderIOHelper(
@@ -31,9 +25,9 @@ PolicyHeaderIOHelper::~PolicyHeaderIOHelper() {
 }
 
 // Sets any necessary policy headers on the passed request.
-void PolicyHeaderIOHelper::AddPolicyHeaders(net::URLRequest* request) const {
+void PolicyHeaderIOHelper::AddPolicyHeaders(const GURL& url,
+                                            net::URLRequest* request) const {
   DCHECK(io_task_runner_->RunsTasksOnCurrentThread());
-  const GURL& url = request->url();
   if (!policy_header_.empty() &&
       url.spec().compare(0, server_url_.size(), server_url_) == 0) {
     request->SetExtraRequestHeaderByName(kChromePolicyHeader,
@@ -56,4 +50,18 @@ void PolicyHeaderIOHelper::UpdateHeaderOnIOThread(
   policy_header_ = new_header;
 }
 
+void PolicyHeaderIOHelper::SetServerURLForTest(const std::string& server_url) {
+  io_task_runner_->PostTask(
+      FROM_HERE,
+      base::Bind(&PolicyHeaderIOHelper::SetServerURLOnIOThread,
+                 base::Unretained(this), server_url));
+
+}
+
+void PolicyHeaderIOHelper::SetServerURLOnIOThread(
+    const std::string& server_url) {
+  DCHECK(io_task_runner_->RunsTasksOnCurrentThread());
+  server_url_ = server_url;
+}
+
 }  // namespace policy