Update content/ to use WeakPtr<T>::get() instead of implicit "operator T*"

content/plugin/webplugin_delegate_stub.cc

Index: content/plugin/webplugin_delegate_stub.cc
diff --git a/content/plugin/webplugin_delegate_stub.cc b/content/plugin/webplugin_delegate_stub.cc
index 2b76d8df97da68239ddbd56e280380a55b24be67..023861dbba3de25b07dd58754ad9b1a96cc021bd 100644
--- a/content/plugin/webplugin_delegate_stub.cc
+++ b/content/plugin/webplugin_delegate_stub.cc
@@ -38,7 +38,7 @@ static void DestroyWebPluginAndDelegate(
     WebPlugin* webplugin) {
   // The plugin may not expect us to try to release the scriptable object
   // after calling NPP_Destroy on the instance, so delete the stub now.
-  if (scriptable_object)
+  if (scriptable_object.get())
     scriptable_object->DeleteSoon();
   // WebPlugin must outlive WebPluginDelegate.
   if (delegate)