Correctly use IsThreadedCompositingEnabled in content_browsertests

content/browser/renderer_host/render_process_host_impl.cc

Index: content/browser/renderer_host/render_process_host_impl.cc
diff --git a/content/browser/renderer_host/render_process_host_impl.cc b/content/browser/renderer_host/render_process_host_impl.cc
index 25e5a056bf24496d3c4ac37d02c076423b77598e..39b3eda454af020b41b2ef88c1af7679c472c518 100644
--- a/content/browser/renderer_host/render_process_host_impl.cc
+++ b/content/browser/renderer_host/render_process_host_impl.cc
@@ -52,6 +52,7 @@
 #include "content/browser/fileapi/chrome_blob_storage_context.h"
 #include "content/browser/fileapi/fileapi_message_filter.h"
 #include "content/browser/geolocation/geolocation_dispatcher_host.h"
+#include "content/browser/gpu/compositor_util.h"
 #include "content/browser/gpu/gpu_data_manager_impl.h"
 #include "content/browser/gpu/gpu_process_host.h"
 #include "content/browser/gpu/shader_disk_cache.h"
@@ -817,6 +818,9 @@ void RenderProcessHostImpl::AppendRendererCommandLine(
                                     field_trial_states);
   }
 
+  if (content::IsThreadedCompositingEnabled())
+    command_line->AppendSwitch(switches::kEnableThreadedCompositing);
+
   GetContentClient()->browser()->AppendExtraCommandLineSwitches(
       command_line, GetID());