Reland: Add MemoryCoordinator

content/renderer/render_thread_impl.cc

Index: content/renderer/render_thread_impl.cc
diff --git a/content/renderer/render_thread_impl.cc b/content/renderer/render_thread_impl.cc
index 660b52bedbb249e4e9c8877f6dd009aa38083e2b..1a4a026079f996e0175ef33cb8e2db71c4c849b5 100644
--- a/content/renderer/render_thread_impl.cc
+++ b/content/renderer/render_thread_impl.cc
@@ -46,6 +46,7 @@
 #include "cc/raster/task_graph_runner.h"
 #include "cc/trees/layer_tree_host_common.h"
 #include "cc/trees/layer_tree_settings.h"
+#include "components/memory_coordinator/child/child_memory_coordinator_impl.h"
 #include "components/scheduler/child/compositor_worker_scheduler.h"
 #include "components/scheduler/child/webthread_base.h"
 #include "components/scheduler/child/webthread_impl_for_worker_scheduler.h"
@@ -823,6 +824,15 @@ void RenderThreadImpl::Init(
       base::Bind(&RenderThreadImpl::OnSyncMemoryPressure,
                  base::Unretained(this))));
 
+  if (memory_coordinator::IsEnabled()) {
+    // TODO(bashi): Revisit how to manage the lifetime of
+    // ChildMemoryCoordinatorImpl.
+    // https://codereview.chromium.org/2094583002/#msg52
+    memory_coordinator_.reset(
+        new memory_coordinator::ChildMemoryCoordinatorImpl(
+            GetRemoteInterfaces()));
+  }
+
   int num_raster_threads = 0;
   std::string string_value =
       command_line.GetSwitchValueASCII(switches::kNumRasterThreads);