Convert MemoryBenchmarkingExtension to gin::Wrappable

content/renderer/render_thread_impl.cc

Index: content/renderer/render_thread_impl.cc
diff --git a/content/renderer/render_thread_impl.cc b/content/renderer/render_thread_impl.cc
index c9db910d19daa48c9d6f80a028a7fe02b559fc05..5dd2429336e3b254ff962cb1c66005ca191ca0d8 100644
--- a/content/renderer/render_thread_impl.cc
+++ b/content/renderer/render_thread_impl.cc
@@ -79,7 +79,6 @@
 #include "content/renderer/media/video_capture_impl_manager.h"
 #include "content/renderer/media/video_capture_message_filter.h"
 #include "content/renderer/media/webrtc_identity_service.h"
-#include "content/renderer/memory_benchmarking_extension.h"
 #include "content/renderer/p2p/socket_dispatcher.h"
 #include "content/renderer/render_process_impl.h"
 #include "content/renderer/render_view_impl.h"
@@ -389,11 +388,6 @@ void RenderThreadImpl::Init() {
   if (command_line.HasSwitch(switches::kEnableGpuBenchmarking))
       RegisterExtension(GpuBenchmarkingExtension::Get());
 
-#if defined(USE_TCMALLOC) && (defined(OS_LINUX) || defined(OS_ANDROID))
-  if (command_line.HasSwitch(switches::kEnableMemoryBenchmarking))
-    RegisterExtension(MemoryBenchmarkingExtension::Get());
-#endif  // USE_TCMALLOC
-
   // Note that under Linux, the media library will normally already have
   // been initialized by the Zygote before this instance became a Renderer.
   base::FilePath media_path;