Utility process: move GTK initialization to the plugin loading code path.

content/utility/utility_thread_impl.cc

Index: content/utility/utility_thread_impl.cc
diff --git a/content/utility/utility_thread_impl.cc b/content/utility/utility_thread_impl.cc
index c979c91a2e756ca4b7b778457271aaee199aa018..d43e531e080c4822636361ec79240ae6fff855c6 100644
--- a/content/utility/utility_thread_impl.cc
+++ b/content/utility/utility_thread_impl.cc
@@ -44,13 +44,6 @@ UtilityThreadImpl::UtilityThreadImpl()
   webkit_platform_support_.reset(new content::WebKitPlatformSupportImpl);
   WebKit::initialize(webkit_platform_support_.get());
   content::GetContentClient()->utility()->UtilityThreadStarted();
-
-  // On Linux, some plugins expect the browser to have loaded glib/gtk. Do that
-  // before attempting to call into the plugin.
-#if defined(TOOLKIT_USES_GTK)
-  g_thread_init(NULL);
-  gfx::GtkInitFromCommandLine(*CommandLine::ForCurrentProcess());
-#endif
 }
 
 UtilityThreadImpl::~UtilityThreadImpl() {
@@ -141,6 +134,14 @@ void UtilityThreadImpl::OnLoadPlugins(
   webkit::npapi::PluginList* plugin_list =
       webkit::npapi::PluginList::Singleton();
 
+  // On Linux, some plugins expect the browser to have loaded glib/gtk. Do that
+  // before attempting to call into the plugin.
+#if defined(TOOLKIT_USES_GTK)
+  CHECK(!g_thread_get_initialized());
+  g_thread_init(NULL);
+  gfx::GtkInitFromCommandLine(*CommandLine::ForCurrentProcess());
+#endif
+
   for (size_t i = 0; i < plugin_paths.size(); ++i) {
     ScopedVector<webkit::npapi::PluginGroup> plugin_groups;
     plugin_list->LoadPlugin(plugin_paths[i], &plugin_groups);