[Autofill] Enable Autofill for dynamically created forms.

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 5b268d9fdfea42dc6f3de494de468db26723586d..81047b205effb2409c563555f016a3bb4639ffc7 100644
--- a/components/autofill/content/renderer/autofill_agent.h
+++ b/components/autofill/content/renderer/autofill_agent.h
@@ -15,7 +15,6 @@
 #include "base/timer/timer.h"
 #include "components/autofill/content/renderer/form_cache.h"
 #include "components/autofill/content/renderer/page_click_listener.h"
-#include "components/autofill/core/common/forms_seen_state.h"
 #include "content/public/renderer/render_view_observer.h"
 #include "third_party/WebKit/public/web/WebAutofillClient.h"
 #include "third_party/WebKit/public/web/WebFormControlElement.h"
@@ -165,6 +164,9 @@ class AutofillAgent : public content::RenderViewObserver,
   void PreviewFieldWithValue(const base::string16& value,
                              blink::WebInputElement* node);
 
+  // Notifies browser of new fillable forms in |frame|.
+  void ProcessForms(const blink::WebLocalFrame& frame);
+
   // Hides any currently showing Autofill popup.
   void HidePopup();
 
@@ -216,8 +218,10 @@ class AutofillAgent : public content::RenderViewObserver,
   // messages to close the Autofill popup when it can't possibly be showing.
   bool is_popup_possibly_visible_;
 
-  // Timestamp of first time forms are seen.
-  base::TimeTicks forms_seen_timestamp_;
+  // True if a message has already been sent about forms for the main frame.
+  // When the main frame is first loaded a message is sent even if no forms

[Ilya Sherman, 2014/04/23 05:51:36]

nit: "first loaded a message" -> "first loaded, a message"

[Garrett Casto, 2014/04/23 21:51:14]

Done.

+  // exist in the frame. Otherwise such messages are supressed.

[Ilya Sherman, 2014/04/23 05:51:36]

nit: "Otherwise such messages" -> "Otherwise, such messages"

[Garrett Casto, 2014/04/23 21:51:14]

Done.

+  bool main_frame_processed_;
 
   base::WeakPtrFactory<AutofillAgent> weak_ptr_factory_;