When an iframe displays its srcdoc, generate navigation events for about:srcdoc

chrome/browser/extensions/api/web_navigation/frame_navigation_state.h

Index: chrome/browser/extensions/api/web_navigation/frame_navigation_state.h
diff --git a/chrome/browser/extensions/api/web_navigation/frame_navigation_state.h b/chrome/browser/extensions/api/web_navigation/frame_navigation_state.h
index 71edaaf506971ea9880e98fc6c7e97b2756dd069..6c70b679c793cf81d4c4cf7138aeb7102c03477c 100644
--- a/chrome/browser/extensions/api/web_navigation/frame_navigation_state.h
+++ b/chrome/browser/extensions/api/web_navigation/frame_navigation_state.h
@@ -54,7 +54,8 @@ class FrameNavigationState {
                   FrameID parent_frame_id,
                   const GURL& url,
                   bool is_main_frame,
-                  bool is_error_page);
+                  bool is_error_page,
+                  bool is_iframe_srcdoc);
 
   // Stops tracking all frames but the frame with |id_to_skip| for a given
   // RenderViewHost.
@@ -116,8 +117,11 @@ class FrameNavigationState {
 
  private:
   struct FrameState {
+    FrameState();
+
     bool error_occurred;  // True if an error has occurred in this frame.
     bool is_main_frame;  // True if this is a main frame.
+    bool is_iframe_srcdoc;  // True if the frame is displaying its srcdoc.
     bool is_navigating;  // True if there is a navigation going on.
     bool is_committed;  // True if the navigation is already committed.
     bool is_server_redirected;  // True if a server redirect happened.