Hosting the discardable memory service in the mus process

content/browser/browser_main_loop.cc

Index: content/browser/browser_main_loop.cc
diff --git a/content/browser/browser_main_loop.cc b/content/browser/browser_main_loop.cc
index 14cfceeae7f49613657cddb059c059f7a0cdcad3..afd2f28cdd6d11655d3744503afa3ecb5e91c7f6 100644
--- a/content/browser/browser_main_loop.cc
+++ b/content/browser/browser_main_loop.cc
@@ -633,14 +633,18 @@ void BrowserMainLoop::PostMainMessageLoopStart() {
     screen_orientation_delegate_.reset(new ScreenOrientationDelegateWin());
 #endif
 
-  auto* discardable_shared_memory_manager =
-      discardable_memory::DiscardableSharedMemoryManager::CreateInstance();
-
-  // TODO(boliu): kSingleProcess check is a temporary workaround for
-  // in-process Android WebView. crbug.com/503724 tracks proper fix.
-  if (!parsed_command_line_.HasSwitch(switches::kSingleProcess)) {
-    base::DiscardableMemoryAllocator::SetInstance(
-        discardable_shared_memory_manager);
+  // Only use discardable_memory::DiscardableSharedMemoryManager when Chrome is
+  // not running in mus+ash.
+  if (!service_manager::ServiceManagerIsRemote()) {
+    auto* discardable_shared_memory_manager =
+        discardable_memory::DiscardableSharedMemoryManager::CreateInstance();
+
+    // TODO(boliu): kSingleProcess check is a temporary workaround for
+    // in-process Android WebView. crbug.com/503724 tracks proper fix.
+    if (!parsed_command_line_.HasSwitch(switches::kSingleProcess)) {
+      base::DiscardableMemoryAllocator::SetInstance(
+          discardable_shared_memory_manager);
+    }
   }
 
   if (parts_)