When starting a provisional load include the parent frame ID in the IPC and pass it down the th WCO…

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

Index: chrome/browser/extensions/api/web_navigation/frame_navigation_state.cc
diff --git a/chrome/browser/extensions/api/web_navigation/frame_navigation_state.cc b/chrome/browser/extensions/api/web_navigation/frame_navigation_state.cc
index 766f04a78239a2a5bc5b8d0f93cdeae9a93f373d..4548eb54f52945542c60b72537512c941ff19f92 100644
--- a/chrome/browser/extensions/api/web_navigation/frame_navigation_state.cc
+++ b/chrome/browser/extensions/api/web_navigation/frame_navigation_state.cc
@@ -89,6 +89,7 @@ bool FrameNavigationState::IsValidUrl(const GURL& url) const {
 }
 
 void FrameNavigationState::TrackFrame(FrameID frame_id,
+                                      FrameID parent_frame_id,
                                       const GURL& url,
                                       bool is_main_frame,
                                       bool is_error_page) {
@@ -99,6 +100,12 @@ void FrameNavigationState::TrackFrame(FrameID frame_id,
   frame_state.is_navigating = true;
   frame_state.is_committed = false;
   frame_state.is_server_redirected = false;
+  if (!is_main_frame) {
+    frame_state.parent_frame_num = parent_frame_id.frame_num;
+  } else {
+    DCHECK(parent_frame_id.frame_num == -1);
+    frame_state.parent_frame_num = -1;
+  }
   frame_ids_.insert(frame_id);
 }
 
@@ -156,6 +163,18 @@ FrameNavigationState::FrameID FrameNavigationState::GetMainFrameID() const {
   return main_frame_id_;
 }
 
+FrameNavigationState::FrameID FrameNavigationState::GetParentFrameID(
+    FrameID frame_id) const {
+  FrameIdToStateMap::const_iterator frame_state =
+      frame_state_map_.find(frame_id);
+  if (frame_state == frame_state_map_.end()) {
+    NOTREACHED();
+    return FrameID();
+  }
+  return FrameID(frame_state->second.parent_frame_num,
+                 frame_id.render_view_host);
+}
+
 void FrameNavigationState::SetErrorOccurredInFrame(FrameID frame_id) {
   DCHECK(frame_state_map_.find(frame_id) != frame_state_map_.end());
   frame_state_map_[frame_id].error_occurred = true;