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 6b248ecd6ea08ebf59e807c44023c5d515d60916..38f4192c62ab9c49290126814c0db5313c88ade3 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)
@@ -1223,6 +1224,21 @@ 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.
+  RenderFrameProxyHost* proxy =
+      frame_tree_node()->render_manager()->GetProxyToParent();
+  if (!proxy) {
+    GetProcess()->ReceivedBadMessage();
+    return;
+  }
+
+  proxy->Send(new FrameMsg_DispatchLoad(proxy->GetRoutingID()));
+}
+
 void RenderFrameHostImpl::OnAccessibilityEvents(
     const std::vector<AccessibilityHostMsg_EventParams>& params,
     int reset_token) {