Propagate inert state to OOPIFs when a modal dialog is active

third_party/WebKit/Source/core/frame/RemoteFrame.cpp

Index: third_party/WebKit/Source/core/frame/RemoteFrame.cpp
diff --git a/third_party/WebKit/Source/core/frame/RemoteFrame.cpp b/third_party/WebKit/Source/core/frame/RemoteFrame.cpp
index b03a004b0c5f0b28b6b1487a833332c2c9aa8c84..59e04dfa6f737d124581887f06d7e4da046c0798 100644
--- a/third_party/WebKit/Source/core/frame/RemoteFrame.cpp
+++ b/third_party/WebKit/Source/core/frame/RemoteFrame.cpp
@@ -29,7 +29,8 @@ inline RemoteFrame::RemoteFrame(RemoteFrameClient* client,
                                 Page& page,
                                 FrameOwner* owner)
     : Frame(client, page, owner, RemoteWindowProxyManager::Create(*this)),
-      security_context_(RemoteSecurityContext::Create()) {
+      security_context_(RemoteSecurityContext::Create()),
+      last_inert_state_(false) {
   dom_window_ = RemoteDOMWindow::Create(*this);
 }
 
@@ -121,6 +122,12 @@ bool RemoteFrame::ShouldClose() {
   return true;
 }
 
+void RemoteFrame::SetIsInert(bool inert) {
+  if (inert != last_inert_state_)
+    Client()->SetIsInert(inert);
+  last_inert_state_ = inert;
+}
+
 void RemoteFrame::SetView(RemoteFrameView* view) {
   // Oilpan: as RemoteFrameView performs no finalization actions,
   // no explicit dispose() of it needed here. (cf. FrameView::dispose().)