Add MemoryCoordinatorDelegate

content/browser/memory/memory_coordinator.h

Index: content/browser/memory/memory_coordinator.h
diff --git a/content/browser/memory/memory_coordinator.h b/content/browser/memory/memory_coordinator.h
index f674ef5b48ce950e5c442c24e73aef850940251d..65f44781c87dee2a2154a75b086f8265de8fe588 100644
--- a/content/browser/memory/memory_coordinator.h
+++ b/content/browser/memory/memory_coordinator.h
@@ -10,6 +10,7 @@
 #include "base/process/process_handle.h"
 #include "content/common/content_export.h"
 #include "content/common/memory_coordinator.mojom.h"
+#include "content/public/browser/memory_coordinator_delegate.h"
 #include "mojo/public/cpp/bindings/binding.h"
 
 namespace content {
@@ -59,6 +60,9 @@ class CONTENT_EXPORT MemoryCoordinator {
   // for testing.
   void OnConnectionError(int render_process_id);
 
+  // Returns true when a given renderer can be suspended.
+  bool CanSuspendRenderer(int render_process_id);
+
  private:
   friend struct base::DefaultSingletonTraits<MemoryCoordinator>;
 
@@ -86,6 +90,8 @@ class CONTENT_EXPORT MemoryCoordinator {
   // disconnected.
   ChildInfoMap children_;
 
+  std::unique_ptr<MemoryCoordinatorDelegate> delegate_;
+
   DISALLOW_COPY_AND_ASSIGN(MemoryCoordinator);
 };