Adjust method name per feedback.

src/Compilers/CSharp/Portable/FlowAnalysis/AbstractFlowPass.cs

@@ -3007,7 +3007,7 @@ public override BoundNode VisitNullCoalescingAssignmentOperator(BoundNullCoalesc
                 VisitReceiverAfterCall(left.ReceiverOpt, readMethod);
 
                 var savedState = this.State.Clone();
-                VisitUnassignedLeftOfNullCoalescingAssignment(node);
+                AdjustStateForNullCoalescingAssignmentNonNullCase(node);
                 leftState = this.State.Clone();
                 SetState(savedState);
                 VisitAssignmentOfNullCoalescingAssignment(node, left);
@@ -3016,7 +3016,7 @@ public override BoundNode VisitNullCoalescingAssignmentOperator(BoundNullCoalesc
             {
                 VisitRvalue(node.LeftOperand, isKnownToBeAnLvalue: true);
                 var savedState = this.State.Clone();
-                VisitUnassignedLeftOfNullCoalescingAssignment(node);
+                AdjustStateForNullCoalescingAssignmentNonNullCase(node);
                 leftState = this.State.Clone();
                 SetState(savedState);
                 VisitAssignmentOfNullCoalescingAssignment(node, propertyAccessOpt: null);
@@ -3053,7 +3053,7 @@ public override BoundNode VisitReadOnlySpanFromArray(BoundReadOnlySpanFromArray
         /// This visitor represents just the non-assignment part of the null coalescing assignment
         /// operator (when the left operand is non-null).
         /// </summary>
-        protected virtual void VisitUnassignedLeftOfNullCoalescingAssignment(BoundNullCoalescingAssignmentOperator node)
+        protected virtual void AdjustStateForNullCoalescingAssignmentNonNullCase(BoundNullCoalescingAssignmentOperator node)
         {
         }
 

src/Compilers/CSharp/Portable/FlowAnalysis/DefiniteAssignment.cs

@@ -2069,7 +2069,7 @@ public override BoundNode VisitDynamicObjectInitializerMember(BoundDynamicObject
             Assign(node.LeftOperand, node.RightOperand);
         }
 
-        protected override void VisitUnassignedLeftOfNullCoalescingAssignment(BoundNullCoalescingAssignmentOperator node)
+        protected override void AdjustStateForNullCoalescingAssignmentNonNullCase(BoundNullCoalescingAssignmentOperator node)
         {
             // For the purposes of definite assignment in try/finally, we need to treat the left as having been assigned
             // in the left-side state. If LeftOperand was not definitely assigned before this call, we will have already