memory_coordinator: Discard tabs under critical memory condition

content/browser/memory/memory_coordinator_impl_unittest.cc

Index: content/browser/memory/memory_coordinator_impl_unittest.cc
diff --git a/content/browser/memory/memory_coordinator_impl_unittest.cc b/content/browser/memory/memory_coordinator_impl_unittest.cc
index 7104ef938c235f568ba886436bce832b6234d004..fbb41af30418fdc8ab8bee3a4eb15bb94b583d44 100644
--- a/content/browser/memory/memory_coordinator_impl_unittest.cc
+++ b/content/browser/memory/memory_coordinator_impl_unittest.cc
@@ -101,7 +101,10 @@ class TestMemoryCoordinatorDelegate : public MemoryCoordinatorDelegate {
     return true;
   }
 
-  void DiscardTab() override { discard_tab_called_ = true; }
+  bool DiscardTab() override {
+    discard_tab_called_ = true;
+    return true;
+  }
 
   bool discard_tab_called() const { return discard_tab_called_; }
 
@@ -514,7 +517,7 @@ TEST_F(MemoryCoordinatorImplTest, ForceSetMemoryCondition) {
 }
 
 TEST_F(MemoryCoordinatorImplTest, DiscardTab) {
-  coordinator_->DiscardTab();
+  EXPECT_TRUE(coordinator_->DiscardTab());
   EXPECT_TRUE(coordinator_->GetDelegate()->discard_tab_called());
 }