Make document.activeElement work with OOPIF

content/renderer/render_frame_impl.cc

Index: content/renderer/render_frame_impl.cc
diff --git a/content/renderer/render_frame_impl.cc b/content/renderer/render_frame_impl.cc
index a7492bb2d872e90fc04cf365e47c633da40d5260..3aa8761bc9bf2594cc6d27b3f439c849772c3122 100644
--- a/content/renderer/render_frame_impl.cc
+++ b/content/renderer/render_frame_impl.cc
@@ -1165,7 +1165,7 @@ bool RenderFrameImpl::OnMessageReceived(const IPC::Message& msg) {
     IPC_MESSAGE_HANDLER(FrameMsg_UpdateOpener, OnUpdateOpener)
     IPC_MESSAGE_HANDLER(FrameMsg_CommitNavigation, OnCommitNavigation)
     IPC_MESSAGE_HANDLER(FrameMsg_DidUpdateSandboxFlags, OnDidUpdateSandboxFlags)
-    IPC_MESSAGE_HANDLER(FrameMsg_ClearFocus, OnClearFocus)
+    IPC_MESSAGE_HANDLER(FrameMsg_SetFocusedFrame, OnSetFocusedFrame)
     IPC_MESSAGE_HANDLER(FrameMsg_SetTextTrackSettings,
                         OnTextTrackSettingsChanged)
     IPC_MESSAGE_HANDLER(FrameMsg_PostMessageEvent, OnPostMessageEvent)
@@ -1721,8 +1721,10 @@ void RenderFrameImpl::OnDidUpdateSandboxFlags(blink::WebSandboxFlags flags) {
   frame_->setFrameOwnerSandboxFlags(flags);
 }
 
-void RenderFrameImpl::OnClearFocus() {
-  frame_->clearFocus();
+void RenderFrameImpl::OnSetFocusedFrame() {
+  // This uses focusDocumentView rather than setFocusedFrame so that blur
+  // events are properly dispatched on any currently focused elements.
+  render_view_->webview()->focusDocumentView(frame_);
 }
 
 void RenderFrameImpl::OnTextTrackSettingsChanged(