Update default policy for memory coordinator

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 8e16c622ebf4c3c00ae1830bfee14148d3c1544f..2ef5229a6a0941dc2038a6832e21b700831359a5 100644
--- a/content/browser/memory/memory_coordinator_impl.cc
+++ b/content/browser/memory/memory_coordinator_impl.cc
@@ -351,6 +351,11 @@ void MemoryCoordinatorImpl::SetDelegateForTesting(
   delegate_ = std::move(delegate);
 }
 
+void MemoryCoordinatorImpl::SetPolicyForTesting(
+    std::unique_ptr<Policy> policy) {
+  policy_ = std::move(policy);
+}
+
 void MemoryCoordinatorImpl::AddChildForTesting(
     int dummy_render_process_id, mojom::ChildMemoryCoordinatorPtr child) {
   mojom::MemoryCoordinatorHandlePtr mch;