Use shared shared URLRequestContextGetter for all gcd_private sessions

chrome/browser/extensions/api/gcd_private/privet_v3_session_unittest.cc

Index: chrome/browser/extensions/api/gcd_private/privet_v3_session_unittest.cc
diff --git a/chrome/browser/extensions/api/gcd_private/privet_v3_session_unittest.cc b/chrome/browser/extensions/api/gcd_private/privet_v3_session_unittest.cc
index ba5ec9060a3ce1d328b75f4106fd0f8443d6d674..002f6c9675cb04e3afe3feb3cbc7bb67c63321d4 100644
--- a/chrome/browser/extensions/api/gcd_private/privet_v3_session_unittest.cc
+++ b/chrome/browser/extensions/api/gcd_private/privet_v3_session_unittest.cc
@@ -8,6 +8,7 @@
 #include "base/command_line.h"
 #include "base/strings/stringprintf.h"
 #include "base/thread_task_runner_handle.h"
+#include "chrome/browser/extensions/api/gcd_private/privet_v3_context_getter.h"
 #include "chrome/browser/local_discovery/privet_http.h"
 #include "chrome/common/chrome_switches.h"
 #include "content/public/test/test_browser_thread_bundle.h"
@@ -73,10 +74,8 @@ class PrivetV3SessionTest : public testing::Test {
     base::CommandLine::ForCurrentProcess()->AppendSwitch(
         switches::kEnablePrivetV3);
 
-    scoped_refptr<net::TestURLRequestContextGetter> context_getter =
-        new net::TestURLRequestContextGetter(
-            content::BrowserThread::GetMessageLoopProxyForThread(
-                content::BrowserThread::IO));
+    scoped_refptr<PrivetV3ContextGetter> context_getter =
+        new PrivetV3ContextGetter(base::ThreadTaskRunnerHandle::Get());
 
     session_.reset(
         new PrivetV3Session(context_getter, net::HostPortPair("host", 80)));