Caption for the Subresource filter bubble prompt.

chrome/browser/ui/content_settings/content_setting_bubble_model.h

Index: chrome/browser/ui/content_settings/content_setting_bubble_model.h
diff --git a/chrome/browser/ui/content_settings/content_setting_bubble_model.h b/chrome/browser/ui/content_settings/content_setting_bubble_model.h
index 897ac77b012efe11f7e98a78baf006ded8ae63f3..afdac2d9671cb3cb94acc28d4d786fa1a994c5f4 100644
--- a/chrome/browser/ui/content_settings/content_setting_bubble_model.h
+++ b/chrome/browser/ui/content_settings/content_setting_bubble_model.h
@@ -108,6 +108,7 @@ class ContentSettingBubbleModel : public content::NotificationObserver {
     BubbleContent();
     ~BubbleContent();
 
+    std::string caption;
     std::string title;
     ListItems list_items;
     RadioGroup radio_group;
@@ -179,6 +180,9 @@ class ContentSettingBubbleModel : public content::NotificationObserver {
   Profile* profile() const { return profile_; }
   Delegate* delegate() const { return delegate_; }
 
+  void set_caption(const std::string& caption) {
+    bubble_content_.caption = caption;
+  }
   void set_title(const std::string& title) { bubble_content_.title = title; }
   void add_list_item(const ListItem& item) {
     bubble_content_.list_items.push_back(item);