[Linux] Call g_thread_init() in UtilityThreadImpl::OnLoadPlugins().

This allows plugins that call into glib for NP_GetMIMEDescription to load
without crashing.

BUG=71661,105252
TEST=Have libTotem plugins installed, go to about:plugins and they are present.


Review URL: http://codereview.chromium.org/8774048

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@113021 0039d316-1c4b-4281-b951-d872f2087c98

content/utility/utility_thread_impl.cc

@@ -6,6 +6,7 @@
 
 #include <stddef.h>
 
+#include "base/command_line.h"
 #include "base/file_path.h"
 #include "base/memory/scoped_vector.h"
 #include "content/common/child_process.h"
@@ -20,6 +21,12 @@
 #include "webkit/glue/idb_bindings.h"
 #include "webkit/plugins/npapi/plugin_list.h"
 
+#if defined(TOOLKIT_USES_GTK)
+#include <gtk/gtk.h>
+
+#include "ui/gfx/gtk_util.h"
+#endif
+
 namespace {
 
 template<typename SRC, typename DEST>
@@ -37,6 +44,13 @@ 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() {