Remove discardable_memory::DSMM::{Create,Get}Instance()

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 aed3789f7230625bd929d0c4a7decd3adfa30f0e..fceebdece1af698eba540eaaf107478be6fa1a7c 100644
--- a/content/browser/browser_main_loop.cc
+++ b/content/browser/browser_main_loop.cc
@@ -733,14 +733,13 @@ void BrowserMainLoop::PostMainMessageLoopStart() {
   // 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();
-
+    discardable_shared_memory_manager_ =
+        base::MakeUnique<discardable_memory::DiscardableSharedMemoryManager>();
     // 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);
+          discardable_shared_memory_manager_.get());
     }
   }