Remove use of deprecated MessageLoop methods in extensions.

extensions/renderer/script_context_set.cc

 // Copyright 2014 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 "extensions/renderer/script_context_set.h"
 
-#include "base/message_loop/message_loop.h"
+#include "base/location.h"
+#include "base/single_thread_task_runner.h"
+#include "base/threading/thread_task_runner_handle.h"
 #include "content/public/common/url_constants.h"
 #include "content/public/renderer/render_frame.h"
 #include "extensions/common/extension.h"
 #include "extensions/renderer/extension_groups.h"
 #include "extensions/renderer/script_context.h"
 #include "extensions/renderer/script_injection.h"
 #include "third_party/WebKit/public/web/WebDocument.h"
 #include "third_party/WebKit/public/web/WebLocalFrame.h"
 #include "v8/include/v8.h"
 
@@ skipping 36 matching lines @@
   ScriptContext* context =
       new ScriptContext(v8_context, frame, extension, context_type,
                         effective_extension, effective_context_type);
   contexts_.insert(context);  // takes ownership
   return context;
 }
 
 void ScriptContextSet::Remove(ScriptContext* context) {
   if (contexts_.erase(context)) {
     context->Invalidate();
-    base::MessageLoop::current()->DeleteSoon(FROM_HERE, context);
+    base::ThreadTaskRunnerHandle::Get()->DeleteSoon(FROM_HERE, context);
   }
 }
 
 ScriptContext* ScriptContextSet::GetCurrent() const {
   v8::Isolate* isolate = v8::Isolate::GetCurrent();
   return isolate->InContext() ? GetByV8Context(isolate->GetCurrentContext())
                               : nullptr;
 }
 
 ScriptContext* ScriptContextSet::GetByV8Context(
@@ skipping 139 matching lines @@
   return Feature::WEB_PAGE_CONTEXT;
 }
 
 void ScriptContextSet::RecordAndRemove(std::set<ScriptContext*>* removed,
                                        ScriptContext* context) {
   removed->insert(context);
   Remove(context);  // Note: context deletion is deferred to the message loop.
 }
 
 }  // namespace extensions