Make load events in iframe elements work with OOPIF (Chromium side).

content/browser/frame_host/render_frame_host_impl.cc

Index: content/browser/frame_host/render_frame_host_impl.cc
diff --git a/content/browser/frame_host/render_frame_host_impl.cc b/content/browser/frame_host/render_frame_host_impl.cc
index e6cc05197d3a25613468d2938787f3f54da90757..d6659ad5c453d9fadf3300306464fd561c82e8a3 100644
--- a/content/browser/frame_host/render_frame_host_impl.cc
+++ b/content/browser/frame_host/render_frame_host_impl.cc
@@ -373,6 +373,7 @@ bool RenderFrameHostImpl::OnMessageReceived(const IPC::Message &msg) {
     IPC_MESSAGE_HANDLER(FrameHostMsg_UpdateEncoding, OnUpdateEncoding)
     IPC_MESSAGE_HANDLER(FrameHostMsg_BeginNavigation,
                         OnBeginNavigation)
+    IPC_MESSAGE_HANDLER(FrameHostMsg_DispatchLoad, OnDispatchLoad)
     IPC_MESSAGE_HANDLER(FrameHostMsg_TextSurroundingSelectionResponse,
                         OnTextSurroundingSelectionResponse)
     IPC_MESSAGE_HANDLER(AccessibilityHostMsg_Events, OnAccessibilityEvents)
@@ -1215,6 +1216,23 @@ void RenderFrameHostImpl::OnBeginNavigation(
       frame_tree_node(), common_params, begin_params, body);
 }
 
+void RenderFrameHostImpl::OnDispatchLoad() {
+  CHECK(base::CommandLine::ForCurrentProcess()->HasSwitch(
+      switches::kSitePerProcess));
+  // Only frames with an out-of-process parent frame should be sending this
+  // message.
+  FrameTreeNode* parent = frame_tree_node()->parent();
+  if (!parent ||
+      parent->current_frame_host()->GetSiteInstance() == GetSiteInstance()) {
+    GetProcess()->ReceivedBadMessage();
+    return;
+  }
+
+  RenderFrameHostImpl* parent_rfh = parent->current_frame_host();
+  parent_rfh->Send(
+      new FrameMsg_DispatchLoad(parent_rfh->GetRoutingID(), routing_id_));
+}
+
 void RenderFrameHostImpl::OnAccessibilityEvents(
     const std::vector<AccessibilityHostMsg_EventParams>& params,
     int reset_token) {