Remove use of deprecated MessageLoop methods in content.

content/public/test/mock_render_process_host.cc

Index: content/public/test/mock_render_process_host.cc
diff --git a/content/public/test/mock_render_process_host.cc b/content/public/test/mock_render_process_host.cc
index dd10d04b7a4aa6c85e0f5871465730bed760fca9..451eefe2e821da013bce47d2fa775eeb777027d8 100644
--- a/content/public/test/mock_render_process_host.cc
+++ b/content/public/test/mock_render_process_host.cc
@@ -9,8 +9,10 @@
 #include <vector>
 
 #include "base/lazy_instance.h"
-#include "base/message_loop/message_loop.h"
+#include "base/location.h"
 #include "base/process/process_handle.h"
+#include "base/single_thread_task_runner.h"
+#include "base/threading/thread_task_runner_handle.h"
 #include "base/time/time.h"
 #include "content/browser/child_process_security_policy_impl.h"
 #include "content/browser/renderer_host/render_process_host_impl.h"
@@ -210,7 +212,7 @@ void MockRenderProcessHost::Cleanup() {
     FOR_EACH_OBSERVER(RenderProcessHostObserver,
                       observers_,
                       RenderProcessHostDestroyed(this));
-    base::MessageLoop::current()->DeleteSoon(FROM_HERE, this);
+    base::ThreadTaskRunnerHandle::Get()->DeleteSoon(FROM_HERE, this);
     RenderProcessHostImpl::UnregisterHost(GetID());
     deletion_callback_called_ = true;
   }