Trivial: Minor clarifications to comments referencing methods on another class.

R=dmazzoni,meredithl

Change-Id: I96a67a64371aec7e005429eda668223fd12ab02f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1874409
Commit-Queue: Dominic Mazzoni <dmazzoni@chromium.org>
Reviewed-by: Dominic Mazzoni <dmazzoni@chromium.org>
Cr-Commit-Position: refs/heads/master@{#708669}

ui/accessibility/ax_node.h

@@ -49,11 +49,11 @@ class AX_EXPORT AXNode final {
       ax::mojom::TextAffinity focus_affinity;
     };
 
-    // See AXTree.
+    // See AXTree::GetAXTreeID.
     virtual AXTreeID GetAXTreeID() const = 0;
-    // See AXTree.
+    // See AXTree::GetTableInfo.
     virtual AXTableInfo* GetTableInfo(const AXNode* table_node) const = 0;
-    // See AXTree.
+    // See AXTree::GetFromId.
     virtual AXNode* GetFromId(int32_t id) const = 0;
 
     virtual int32_t GetPosInSet(const AXNode& node,