Close web contents modal dialogs on content load start

chrome/browser/ui/autofill/autofill_dialog_controller_impl.h

Index: chrome/browser/ui/autofill/autofill_dialog_controller_impl.h
diff --git a/chrome/browser/ui/autofill/autofill_dialog_controller_impl.h b/chrome/browser/ui/autofill/autofill_dialog_controller_impl.h
index 91113565f13ffa076ada9203dc45944fc879fef5..0f9e0700a261139d4159c7afdc42b7294cab193c 100644
--- a/chrome/browser/ui/autofill/autofill_dialog_controller_impl.h
+++ b/chrome/browser/ui/autofill/autofill_dialog_controller_impl.h
@@ -33,6 +33,7 @@
 #include "components/autofill/core/browser/personal_data_manager_observer.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
+#include "content/public/browser/web_contents_observer.h"
 #include "content/public/common/ssl_status.h"
 #include "ui/base/models/simple_menu_model.h"
 #include "ui/base/ui_base_types.h"
@@ -69,6 +70,7 @@ class WalletSigninHelper;
 class AutofillDialogControllerImpl : public AutofillDialogController,
                                      public AutofillPopupDelegate,
                                      public content::NotificationObserver,
+                                     public content::WebContentsObserver,
                                      public SuggestionsMenuModelDelegate,
                                      public wallet::WalletClientDelegate,
                                      public wallet::WalletSigninHelperDelegate,
@@ -193,6 +195,11 @@ class AutofillDialogControllerImpl : public AutofillDialogController,
                        const content::NotificationSource& source,
                        const content::NotificationDetails& details) OVERRIDE;
 
+  // content::WebContentsObserver implementation.
+  virtual void DidNavigateMainFrame(
+      const content::LoadCommittedDetails& details,
+      const content::FrameNavigateParams& params);
+
   // SuggestionsMenuModelDelegate implementation.
   virtual void SuggestionItemSelected(SuggestionsMenuModel* model,
                                       size_t index) OVERRIDE;