Add a public interface for content::MemoryCoordinator

content/browser/memory/memory_coordinator_impl.cc

Index: content/browser/memory/memory_coordinator_impl.cc
diff --git a/content/browser/memory/memory_coordinator_impl.cc b/content/browser/memory/memory_coordinator_impl.cc
index 0ed6859c49a819d8a97f8dcd63450f82a72bcb38..ec2bc2048031624902e40416d40ca4b2b991ea49 100644
--- a/content/browser/memory/memory_coordinator_impl.cc
+++ b/content/browser/memory/memory_coordinator_impl.cc
@@ -154,6 +154,11 @@ struct MemoryCoordinatorImplSingletonTraits
 };
 
 // static
+MemoryCoordinator* MemoryCoordinator::GetInstance() {
+  return MemoryCoordinatorImpl::GetInstance();
+}
+
+// static
 MemoryCoordinatorImpl* MemoryCoordinatorImpl::GetInstance() {
   if (!base::FeatureList::IsEnabled(features::kMemoryCoordinator))
     return nullptr;
@@ -297,6 +302,22 @@ void MemoryCoordinatorImpl::Observe(int type,
   SetChildMemoryState(iter->first, new_state);
 }
 
+base::MemoryState MemoryCoordinatorImpl::GetStateForProcess(
+    base::ProcessHandle handle) {
+  DCHECK(CalledOnValidThread());
+  if (handle == base::kNullProcessHandle)
+    return MemoryState::UNKNOWN;
+  if (handle == base::GetCurrentProcessHandle())
+    return GetCurrentMemoryState();
+
+  for (auto& iter : children()) {
+    auto* render_process_host = GetRenderProcessHost(iter.first);
+    if (render_process_host && render_process_host->GetHandle() == handle)
+      return iter.second.memory_state;
+  }
+  return MemoryState::UNKNOWN;
+}
+
 bool MemoryCoordinatorImpl::ChangeStateIfNeeded(base::MemoryState prev_state,
                                                 base::MemoryState next_state) {
   DCHECK(CalledOnValidThread());