Cross-process postMessage

content/browser/renderer_host/render_process_host_impl.cc

Index: content/browser/renderer_host/render_process_host_impl.cc
diff --git a/content/browser/renderer_host/render_process_host_impl.cc b/content/browser/renderer_host/render_process_host_impl.cc
index 3dca1b3cb7e75eea29e27a007fbf5038d317d1c7..2c7c9f51234e3bdf5bfe035b6868c458d8f783e6 100644
--- a/content/browser/renderer_host/render_process_host_impl.cc
+++ b/content/browser/renderer_host/render_process_host_impl.cc
@@ -903,6 +903,7 @@ bool RenderProcessHostImpl::OnMessageReceived(const IPC::Message& msg) {
                           OnUserMetricsRecordAction)
       IPC_MESSAGE_HANDLER(ViewHostMsg_RevealFolderInOS, OnRevealFolderInOS)
       IPC_MESSAGE_HANDLER(ViewHostMsg_SavedPageAsMHTML, OnSavedPageAsMHTML)
+      IPC_MESSAGE_HANDLER(ViewHostMsg_SendPostMessage, OnSendPostMessage)
       IPC_MESSAGE_UNHANDLED_ERROR()
     IPC_END_MESSAGE_MAP_EX()
 
@@ -1317,3 +1318,30 @@ void RenderProcessHostImpl::OnSavedPageAsMHTML(int job_id, int64 data_size) {
   content::GetContentClient()->browser()->GetMHTMLGenerationManager()->
       MHTMLGenerated(job_id, data_size);
 }
+
+void RenderProcessHostImpl::OnSendPostMessage(int64 browsing_instance_frame_id,
+                                              const ViewMsg_PostMessage_Params& params) {
+  DLOG(WARNING) << "OnSendPostMessage";
+  content::FrameMapper& frame_mapper = GetBrowserContext()->frame_mapper();
+  content::BrowsingInstanceFrame* frame =
+      frame_mapper.FindById(browsing_instance_frame_id);
+
+  // Until we remove the proxy when a frame is closed, there might be a proxy
+  // for a frame that no longer exists. If that's the case, just drop the msg.
+  if (!frame) {
+    return;
+  }
+
+  RenderViewHost *rvh = RenderViewHost::FromID(frame->current_process_host_id(),
+                                               frame->current_route_id());
+
+  // TODO(supersat): Temporary workaround for frames not being removed from
+  // the mapper properly.
+  if (!rvh) {
+    return;
+  }
+
+  rvh->Send(new ViewMsg_PostMessage(rvh->routing_id(),
+                                    frame->current_frame_id(),
+                                    params));
+}