discardable_memory: Using mojo IPC to replace Chrome IPC

content/browser/renderer_host/render_process_host_impl.cc

Index: content/browser/renderer_host/render_process_host_impl.cc
diff --git a/content/browser/renderer_host/render_process_host_impl.cc b/content/browser/renderer_host/render_process_host_impl.cc
index c8cbea2370ade26c37a59d63bc45b09ecf01a971..fd4df2fafd8e33b46fa9a1a23b3aec5fd6a99257 100644
--- a/content/browser/renderer_host/render_process_host_impl.cc
+++ b/content/browser/renderer_host/render_process_host_impl.cc
@@ -47,6 +47,7 @@
 #include "build/build_config.h"
 #include "cc/base/switches.h"
 #include "cc/output/buffer_to_texture_target_map.h"
+#include "components/discardable_memory/service/discardable_shared_memory_manager.h"
 #include "components/tracing/common/tracing_switches.h"
 #include "content/browser/appcache/appcache_dispatcher_host.h"
 #include "content/browser/appcache/chrome_appcache_service.h"
@@ -1280,6 +1281,10 @@ void RenderProcessHostImpl::RegisterMojoInterfaces() {
       registry.get(), base::Bind(&WebSocketManager::CreateWebSocket, GetID(),
                                  MSG_ROUTING_NONE));
 
+  registry->AddInterface(
+      discardable_memory::DiscardableSharedMemoryManager::current()
+          ->GetBindCallback());
+
   GetContentClient()->browser()->ExposeInterfacesToRenderer(registry.get(),
                                                             this);