Make document.activeElement work with OOPIF

content/browser/frame_host/frame_tree.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/frame_host/frame_tree.h"
 
 #include <queue>
 #include <utility>
 
 #include "base/bind.h"
@@ skipping 253 matching lines @@
 }
 
 FrameTreeNode* FrameTree::GetFocusedFrame() {
   return FindByID(focused_frame_tree_node_id_);
 }
 
 void FrameTree::SetFocusedFrame(FrameTreeNode* node) {
   // If the focused frame changed across processes, send a message to the old
   // focused frame's renderer process to clear focus from that frame and fire
   // blur events.
-  FrameTreeNode* oldFocusedFrame = GetFocusedFrame();
-  if (oldFocusedFrame &&
-      oldFocusedFrame->current_frame_host()->GetSiteInstance() !=
-          node->current_frame_host()->GetSiteInstance()) {
-    DCHECK(SiteIsolationPolicy::AreCrossProcessFramesPossible());
-    oldFocusedFrame->current_frame_host()->ClearFocus();
+  FrameTreeNode* old_focused_frame = GetFocusedFrame();
+  if (old_focused_frame) {
+    SiteInstance* old_site_instance =
+        old_focused_frame->current_frame_host()->GetSiteInstance();
+    if (old_site_instance != node->current_frame_host()->GetSiteInstance()) {
+      DCHECK(SiteIsolationPolicy::AreCrossProcessFramesPossible());
+      RenderFrameProxyHost* proxy =
+          node->render_manager()->GetRenderFrameProxyHost(old_site_instance);
+      proxy->SetFocusedFrame();
+    }
   }
 
   node->set_last_focus_time(base::TimeTicks::Now());
   focused_frame_tree_node_id_ = node->frame_tree_node_id();
 }
 
 void FrameTree::SetFrameRemoveListener(
     const base::Callback<void(RenderFrameHost*)>& on_frame_removed) {
   on_frame_removed_ = on_frame_removed;
 }
@@ skipping 149 matching lines @@
   // This is only used to set page-level focus in cross-process subframes, and
   // requests to set focus in main frame's SiteInstance are ignored.
   if (instance != root_manager->current_frame_host()->GetSiteInstance()) {
     RenderFrameProxyHost* proxy =
         root_manager->GetRenderFrameProxyHost(instance);
     proxy->Send(new InputMsg_SetFocus(proxy->GetRoutingID(), is_focused));
   }
 }
 
 }  // namespace content