Hosting the discardable memory service in the mus process

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 72f3b1c38021993a023dea12b20bbe784cfb595c..5f2be6ad47ee3c9773216239e6896014e509f17c 100644
--- a/content/browser/renderer_host/render_process_host_impl.cc
+++ b/content/browser/renderer_host/render_process_host_impl.cc
@@ -183,6 +183,7 @@
 #include "services/service_manager/public/cpp/connection.h"
 #include "services/service_manager/public/cpp/interface_provider.h"
 #include "services/service_manager/public/cpp/interface_registry.h"
+#include "services/service_manager/runner/common/client_util.h"
 #include "services/service_manager/runner/common/switches.h"
 #include "storage/browser/fileapi/sandbox_file_system_backend.h"
 #include "third_party/WebKit/public/public_features.h"
@@ -1295,10 +1296,14 @@ void RenderProcessHostImpl::RegisterMojoInterfaces() {
       registry.get(), base::Bind(&WebSocketManager::CreateWebSocket, GetID(),
                                  MSG_ROUTING_NONE));
 
-  registry->AddInterface(base::Bind(
-      &discardable_memory::DiscardableSharedMemoryManager::Bind,
-      base::Unretained(
-          discardable_memory::DiscardableSharedMemoryManager::GetInstance())));
+  // Chrome browser process only provides DiscardableSharedMemory service when
+  // Chrome is not running in mus+ash.
+  if (!service_manager::ServiceManagerIsRemote()) {
+    registry->AddInterface(base::Bind(
+        &discardable_memory::DiscardableSharedMemoryManager::Bind,
+        base::Unretained(discardable_memory::DiscardableSharedMemoryManager::
+                             GetInstance())));
+  }
 
   GetContentClient()->browser()->ExposeInterfacesToRenderer(registry.get(),
                                                             this);