Stop using callbacks in MemoryCoordinatorProxy

content/browser/memory/memory_coordinator.cc

Index: content/browser/memory/memory_coordinator.cc
diff --git a/content/browser/memory/memory_coordinator.cc b/content/browser/memory/memory_coordinator.cc
index b691322002007921695018b1e3ae16c69fec041d..47fc0210f666d87d58a8f37f5658f094d852302e 100644
--- a/content/browser/memory/memory_coordinator.cc
+++ b/content/browser/memory/memory_coordinator.cc
@@ -137,12 +137,10 @@ base::MemoryState MemoryCoordinator::GetGlobalMemoryState() const {
   return base::MemoryState::UNKNOWN;
 }
 
-base::MemoryState MemoryCoordinator::GetCurrentMemoryState() const {
-  return base::MemoryState::UNKNOWN;
-}
-
-void MemoryCoordinator::SetCurrentMemoryStateForTesting(
-    base::MemoryState memory_state) {
+base::WeakPtr<base::MemoryCoordinatorInterface>
+MemoryCoordinator::GetWeakPtr() {
+  NOTREACHED();
+  return nullptr;
 }
 
 void MemoryCoordinator::AddChildForTesting(