Make utility process run in-process when running in single-process mode.

content/browser/plugin_service_impl.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/plugin_service_impl.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/compiler_specific.h"
 #include "base/files/file_path.h"
@@ skipping 48 matching lines @@
   TOTAL_BROWSER_PROCESSES,
   FLASH_USAGE_ENUM_COUNT
 };
 
 bool LoadPluginListInProcess() {
 #if defined(OS_WIN)
   return true;
 #else
   // If on POSIX, we don't want to load the list of NPAPI plugins in-process as
   // that causes instability.
+
+  // Can't load the plugins on the utility thread when in single process mode
+  // since that requires using WebKit and GTK and they can only be used on the
+  // main thread.
+  if (RenderProcessHost::run_renderer_in_process())
+    return true;
+
   return !webkit::npapi::NPAPIPluginsSupported();
 #endif
 }
 
 // Callback set on the PluginList to assert that plugin loading happens on the
 // correct thread.
 void WillLoadPluginsCallback(
     base::SequencedWorkerPool::SequenceToken token) {
   if (LoadPluginListInProcess()) {
     CHECK(BrowserThread::GetBlockingPool()->IsRunningSequenceOnCurrentThread(
@@ skipping 708 matching lines @@
 void PluginServiceImpl::GetInternalPlugins(
     std::vector<webkit::WebPluginInfo>* plugins) {
   plugin_list_->GetInternalPlugins(plugins);
 }
 
 webkit::npapi::PluginList* PluginServiceImpl::GetPluginList() {
   return plugin_list_;
 }
 
 }  // namespace content