Establish MojoChildConnection from BrowserChildProcessHostImpl

content/public/test/test_utils.cc

Index: content/public/test/test_utils.cc
diff --git a/content/public/test/test_utils.cc b/content/public/test/test_utils.cc
index 892b57edd727569f3e4125a561503bd50876cb3a..78c4adf69dffc99fa1cb78d82abc1ec30d3c9e4f 100644
--- a/content/public/test/test_utils.cc
+++ b/content/public/test/test_utils.cc
@@ -25,6 +25,7 @@
 #include "content/public/common/content_switches.h"
 #include "content/public/common/process_type.h"
 #include "content/public/test/test_launcher.h"
+#include "content/public/test/test_mojo_shell_context.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 #if defined(OS_ANDROID)
@@ -310,7 +311,7 @@ void WindowedNotificationObserver::Observe(
 }
 
 InProcessUtilityThreadHelper::InProcessUtilityThreadHelper()
-    : child_thread_count_(0) {
+    : child_thread_count_(0), shell_context_(new TestMojoShellContext) {
   RenderProcessHost::SetRunRendererInProcess(true);
   BrowserChildProcessObserver::Add(this);
 }