Remove use of deprecated MessageLoop methods in content.

content/renderer/image_downloader/image_downloader_impl.cc

Index: content/renderer/image_downloader/image_downloader_impl.cc
diff --git a/content/renderer/image_downloader/image_downloader_impl.cc b/content/renderer/image_downloader/image_downloader_impl.cc
index b08decf0cc53ef4ec6848a8daed1d93d551e084e..ed8eb8952813da2b3a035dc46f1ab66a849427f9 100644
--- a/content/renderer/image_downloader/image_downloader_impl.cc
+++ b/content/renderer/image_downloader/image_downloader_impl.cc
@@ -7,8 +7,10 @@
 #include <utility>
 
 #include "base/bind.h"
+#include "base/location.h"
 #include "base/logging.h"
-#include "base/message_loop/message_loop.h"
+#include "base/single_thread_task_runner.h"
+#include "base/threading/thread_task_runner_handle.h"
 #include "content/child/image_decoder.h"
 #include "content/public/renderer/render_frame.h"
 #include "content/public/renderer/render_thread.h"
@@ -209,7 +211,7 @@ void ImageDownloaderImpl::DidFetchImage(
       std::find(image_fetchers_.begin(), image_fetchers_.end(), fetcher);
   if (iter != image_fetchers_.end()) {
     image_fetchers_.weak_erase(iter);
-    base::MessageLoop::current()->DeleteSoon(FROM_HERE, fetcher);
+    base::ThreadTaskRunnerHandle::Get()->DeleteSoon(FROM_HERE, fetcher);
   }
 }