Revert of 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 b85875a06c5f6fe51ffd82338b56e773eb480895..a9be00c263d13664681b4cfde2d9f6fe7aa93919 100644
--- a/content/browser/renderer_host/render_process_host_impl.cc
+++ b/content/browser/renderer_host/render_process_host_impl.cc
@@ -47,7 +47,6 @@
 #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"
@@ -1294,11 +1293,6 @@
   AddUIThreadInterface(
       registry.get(), base::Bind(&WebSocketManager::CreateWebSocket, GetID(),
                                  MSG_ROUTING_NONE));
-
-  registry->AddInterface(base::Bind(
-      &discardable_memory::DiscardableSharedMemoryManager::Bind,
-      base::Unretained(
-          discardable_memory::DiscardableSharedMemoryManager::GetInstance())));
 
   GetContentClient()->browser()->ExposeInterfacesToRenderer(registry.get(),
                                                             this);