Requery the autofill server when forms and input fields are dynamically added.

components/autofill/renderer/autofill_agent.h

Index: components/autofill/renderer/autofill_agent.h
diff --git a/components/autofill/renderer/autofill_agent.h b/components/autofill/renderer/autofill_agent.h
index b6da184e76c9f3c8ecc41bd270ad959cc1c323d0..9b53325ff0acda9a963e689fa7e36c900ba20b78 100644
--- a/components/autofill/renderer/autofill_agent.h
+++ b/components/autofill/renderer/autofill_agent.h
@@ -13,6 +13,7 @@
 #include "base/memory/weak_ptr.h"
 #include "base/time.h"
 #include "base/timer.h"
+#include "components/autofill/common/forms_seen_state.h"
 #include "components/autofill/renderer/form_cache.h"
 #include "components/autofill/renderer/page_click_listener.h"
 #include "content/public/renderer/render_view_observer.h"
@@ -103,6 +104,8 @@ class AutofillAgent : public content::RenderViewObserver,
       WebKit::WebFrame* frame,
       const WebKit::WebFormElement& form) OVERRIDE;
   virtual void setIgnoreTextChanges(bool ignore) OVERRIDE;
+  virtual void didAssociateFormControls(
+      const WebKit::WebVector<WebKit::WebNode>& nodes) OVERRIDE;
 
   void OnSuggestionsReturned(int query_id,
                              const std::vector<base::string16>& values,
@@ -206,6 +209,8 @@ class AutofillAgent : public content::RenderViewObserver,
   // Hides any currently showing Autofill UI in the browser only.
   void HideHostAutofillUi();
 
+  void MaybeSendDynamicFormsSeen();
+
   FormCache form_cache_;
 
   PasswordAutofillAgent* password_autofill_agent_;  // WEAK reference.
@@ -256,6 +261,10 @@ class AutofillAgent : public content::RenderViewObserver,
   // Whether or not |topmost_frame_| is whitelisted for Autocheckout.
   bool is_whitelisted_for_autocheckout_;
 
+  // Whether or not new forms/fields have been dynamically added
+  // since the last loaded forms were sent to the browser process.
+  bool has_new_forms_for_browser_;
+
   // Whether or not to ignore text changes.  Useful for when we're committing
   // a composition when we are defocusing the WebView and we don't want to
   // trigger an autofill popup to show.
@@ -269,6 +278,7 @@ class AutofillAgent : public content::RenderViewObserver,
   friend class PasswordAutofillAgentTest;
   FRIEND_TEST_ALL_PREFIXES(ChromeRenderViewTest, FillFormElement);
   FRIEND_TEST_ALL_PREFIXES(ChromeRenderViewTest, SendForms);
+  FRIEND_TEST_ALL_PREFIXES(ChromeRenderViewTest, SendDynamicForms);
   FRIEND_TEST_ALL_PREFIXES(ChromeRenderViewTest, ShowAutofillWarning);
   FRIEND_TEST_ALL_PREFIXES(PasswordAutofillAgentTest, WaitUsername);
   FRIEND_TEST_ALL_PREFIXES(PasswordAutofillAgentTest, SuggestionAccept);