[Linux] Load plugins out-of-process.

content/browser/plugin_loader_posix.h

Index: content/browser/plugin_loader_posix.h
diff --git a/content/browser/plugin_loader_posix.h b/content/browser/plugin_loader_posix.h
index 1af295799eabe21e4cfd56de7a04065f250c4c42..9769d26148b0b2410ab29fcf213deea24fe9419c 100644
--- a/content/browser/plugin_loader_posix.h
+++ b/content/browser/plugin_loader_posix.h
@@ -87,7 +87,7 @@ class PluginLoaderPosix : public UtilityProcessHost::Client,
   // Runs all the registered callbacks on each's target loop if the condition
   // for ending the load process is done (i.e. the |next_load_index_| is outside
   // the ranage of the |canonical_list_|).
-  void RunPendingCallbacks();
+  bool MaybeRunPendingCallbacks();
 
   // The process host for which this is a client.
   UtilityProcessHost* process_host_;