Add delegate and factory function for ChildMemoryCoordinator

components/memory_coordinator/child/child_memory_coordinator_impl_android.cc

Index: components/memory_coordinator/child/child_memory_coordinator_impl_android.cc
diff --git a/components/memory_coordinator/child/child_memory_coordinator_impl_android.cc b/components/memory_coordinator/child/child_memory_coordinator_impl_android.cc
new file mode 100644
index 0000000000000000000000000000000000000000..976994c19850e5cc3030a9461a7dc9c246a4d861
--- /dev/null
+++ b/components/memory_coordinator/child/child_memory_coordinator_impl_android.cc
@@ -0,0 +1,29 @@
+// Copyright 2016 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 "components/memory_coordinator/child/child_memory_coordinator_impl_android.h"
+
+namespace memory_coordinator {
+
+ChildMemoryCoordinatorImplAndroid::ChildMemoryCoordinatorImplAndroid(
+    mojom::MemoryCoordinatorHandlePtr parent,
+    ChildMemoryCoordinatorDelegate* delegate)
+    : ChildMemoryCoordinatorImpl(std::move(parent), delegate) {}
+
+ChildMemoryCoordinatorImplAndroid::~ChildMemoryCoordinatorImplAndroid() {}
+
+void ChildMemoryCoordinatorImplAndroid::OnTrimMemory(int level) {
+  // TODO(bashi): Compare |level| with levels defined in
+  // ComponentCallbacks2 when JNI bindings are implemented.
+  delegate()->OnTrimMemoryImmediately();
+}
+
+std::unique_ptr<ChildMemoryCoordinatorImpl> CreateChildMemoryCoordinator(
+    mojom::MemoryCoordinatorHandlePtr parent,
+    ChildMemoryCoordinatorDelegate* delegate) {
+  return base::WrapUnique(
+      new ChildMemoryCoordinatorImplAndroid(std::move(parent), delegate));
+}
+
+}  // namespace memory_coordinator