Revert "content: Remove use of MessageLoopProxy and deprecated MessageLoop APIs"

content/browser/plugin_loader_posix.cc

Index: content/browser/plugin_loader_posix.cc
diff --git a/content/browser/plugin_loader_posix.cc b/content/browser/plugin_loader_posix.cc
index bfc9032f665bfe0e33867078f65d5beed3940c5a..b8750ed90ea3cf037c36132856c1dc1c8cd9f537 100644
--- a/content/browser/plugin_loader_posix.cc
+++ b/content/browser/plugin_loader_posix.cc
@@ -5,10 +5,9 @@
 #include "content/browser/plugin_loader_posix.h"
 
 #include "base/bind.h"
-#include "base/location.h"
+#include "base/message_loop/message_loop.h"
+#include "base/message_loop/message_loop_proxy.h"
 #include "base/metrics/histogram.h"
-#include "base/single_thread_task_runner.h"
-#include "base/thread_task_runner_handle.h"
 #include "content/browser/utility_process_host_impl.h"
 #include "content/common/child_process_host_impl.h"
 #include "content/common/plugin_list.h"
@@ -30,8 +29,8 @@ void PluginLoaderPosix::GetPlugins(
   std::vector<WebPluginInfo> cached_plugins;
   if (PluginList::Singleton()->GetPluginsNoRefresh(&cached_plugins)) {
     // Can't assume the caller is reentrant.
-    base::ThreadTaskRunnerHandle::Get()->PostTask(
-        FROM_HERE, base::Bind(callback, cached_plugins));
+    base::MessageLoop::current()->PostTask(FROM_HERE,
+        base::Bind(callback, cached_plugins));
     return;
   }
 
@@ -227,7 +226,7 @@ void PluginLoaderPosix::FinishedLoadingPlugins() {
   PluginList::Singleton()->SetPlugins(loaded_plugins_);
 
   for (auto& callback : callbacks_) {
-    base::ThreadTaskRunnerHandle::Get()->PostTask(
+    base::MessageLoop::current()->PostTask(
         FROM_HERE, base::Bind(callback, loaded_plugins_));
   }
   callbacks_.clear();