Add delay to didAssociateFormControlsTimer so it doesn't fire too frequently

components/autofill/content/renderer/autofill_agent.h

Index: components/autofill/content/renderer/autofill_agent.h
diff --git a/components/autofill/content/renderer/autofill_agent.h b/components/autofill/content/renderer/autofill_agent.h
index aaf357670086c8b8c2ed4e2be291121a47c4a5fe..592c4f6ef5470321be3043eec269f36ecc444790 100644
--- a/components/autofill/content/renderer/autofill_agent.h
+++ b/components/autofill/content/renderer/autofill_agent.h
@@ -58,6 +58,11 @@ class AutofillAgent : public content::RenderFrameObserver,
 
   void BindRequest(mojom::AutofillAgentRequest request);
 
+ protected:
+  // blink::WebAutofillClient:
+  void didAssociateFormControls(
+      const blink::WebVector<blink::WebNode>& nodes) override;
+
  private:
   // Functor used as a simplified comparison function for FormData. Only
   // compares forms at a high level (notably name, origin, action).
@@ -146,8 +151,6 @@ class AutofillAgent : public content::RenderFrameObserver,
       const blink::WebInputElement& element,
       const blink::WebKeyboardEvent& event) override;
   void setIgnoreTextChanges(bool ignore) override;
-  void didAssociateFormControls(
-      const blink::WebVector<blink::WebNode>& nodes) override;
   void openTextDataListChooser(const blink::WebInputElement& element) override;
   void dataListOptionsChanged(const blink::WebInputElement& element) override;
   void firstUserGestureObserved() override;