content: Use base::MessageLoop.

content/plugin/plugin_thread.cc

Index: content/plugin/plugin_thread.cc
diff --git a/content/plugin/plugin_thread.cc b/content/plugin/plugin_thread.cc
index 595bf5b4af2017537664354fe531a4b011828e3e..8256ef698026a0abb212a647090a285f616a45e2 100644
--- a/content/plugin/plugin_thread.cc
+++ b/content/plugin/plugin_thread.cc
@@ -58,7 +58,7 @@ class EnsureTerminateMessageFilter : public IPC::ChannelProxy::MessageFilter {
     // Ensure that we don't wait indefinitely for the plugin to shutdown.
     // as the browser does not terminate plugin processes on shutdown.
     // We achieve this by posting an exit process task on the IO thread.
-    MessageLoop::current()->PostDelayedTask(
+    base::MessageLoop::current()->PostDelayedTask(
         FROM_HERE,
         base::Bind(&EnsureTerminateMessageFilter::Terminate, this),
         kPluginProcessTerminateTimeout);