Expose DiscardTab() to MemoryCoordiantor

content/browser/memory/memory_coordinator_impl.h

Index: content/browser/memory/memory_coordinator_impl.h
diff --git a/content/browser/memory/memory_coordinator_impl.h b/content/browser/memory/memory_coordinator_impl.h
index eb5bf0444d238aa1c3a0e32640beee991b09fbf6..f3189b6ea19909041064bbfeddc80e6cf696b465 100644
--- a/content/browser/memory/memory_coordinator_impl.h
+++ b/content/browser/memory/memory_coordinator_impl.h
@@ -101,6 +101,9 @@ class CONTENT_EXPORT MemoryCoordinatorImpl : public base::MemoryCoordinator,
   // the state is actually changed.
   bool ChangeStateIfNeeded(MemoryState prev_state, MemoryState next_state);
 
+  // Asks the delegate to discard a tab.
+  void DiscardTab();
+
  protected:
   // Returns the RenderProcessHost which is correspond to the given id.
   // Returns nullptr if there is no corresponding RenderProcessHost.
@@ -112,6 +115,8 @@ class CONTENT_EXPORT MemoryCoordinatorImpl : public base::MemoryCoordinator,
   void SetDelegateForTesting(
       std::unique_ptr<MemoryCoordinatorDelegate> delegate);
 
+  MemoryCoordinatorDelegate* delegate() { return delegate_.get(); }
+
   // Adds the given ChildMemoryCoordinator as a child of this coordinator.
   void AddChildForTesting(int dummy_render_process_id,
                           mojom::ChildMemoryCoordinatorPtr child);