Hosting the discardable memory service in the mus process

chrome/browser/ui/views/chrome_browser_main_extra_parts_views.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/ui/views/chrome_browser_main_extra_parts_views.h"
 
 #include "chrome/browser/ui/views/chrome_constrained_window_views_client.h"
 #include "chrome/browser/ui/views/chrome_views_delegate.h"
 #include "chrome/browser/ui/views/ime_driver_mus.h"
 #include "components/constrained_window/constrained_window_views.h"
 
 #if defined(USE_AURA)
+#include "base/memory/discardable_memory_allocator.h"
 #include "base/run_loop.h"
+#include "components/discardable_memory/client/client_discardable_shared_memory_manager.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/common/service_manager_connection.h"
 #include "services/service_manager/public/cpp/connector.h"
 #include "services/service_manager/runner/common/client_util.h"
 #include "services/ui/public/cpp/gpu/gpu_service.h"
 #include "services/ui/public/cpp/input_devices/input_device_client.h"
 #include "services/ui/public/interfaces/constants.mojom.h"
 #include "services/ui/public/interfaces/input_devices/input_device_server.mojom.h"
 #include "ui/display/screen.h"
 #include "ui/views/mus/window_manager_connection.h"
@@ skipping 82 matching lines @@
     base::RunLoop wait_loop;
     connection->SetInitializeHandler(wait_loop.QuitClosure());
     wait_loop.Run();
 
     input_device_client_.reset(new ui::InputDeviceClient());
     ui::mojom::InputDeviceServerPtr server;
     connection->GetConnector()->ConnectToInterface(ui::mojom::kServiceName,
                                                    &server);
     input_device_client_->Connect(std::move(server));
 
+    discardable_memory::mojom::DiscardableSharedMemoryManagerPtr manager;
+
+    connection->GetConnector()->ConnectToInterface(ui::mojom::kServiceName,
+                                                   &manager);
+    discardable_shared_memory_manager_ = base::MakeUnique<
+        discardable_memory::ClientDiscardableSharedMemoryManager>(
+        std::move(manager), content::BrowserThread::GetTaskRunnerForThread(
+                                content::BrowserThread::IO));
+    base::DiscardableMemoryAllocator::SetInstance(
+        discardable_shared_memory_manager_.get());
+
     window_manager_connection_ = views::WindowManagerConnection::Create(
         connection->GetConnector(), connection->GetIdentity(),
         content::BrowserThread::GetTaskRunnerForThread(
             content::BrowserThread::IO));
   }
 #endif  // defined(USE_AURA)
 }