Cross-process postMessage

content/common/swapped_out_messages.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/common/swapped_out_messages.h"
 
 #include "content/common/view_messages.h"
 #include "content/public/common/content_client.h"
 
 namespace content {
 
-bool SwappedOutMessages::CanSendWhileSwappedOut(const IPC::Message* msg) {
-  // We filter out most IPC messages when swapped out.  However, some are
-  // important (e.g., ACKs) for keeping the browser and renderer state
-  // consistent in case we later return to the same renderer.
-  switch (msg->type()) {
+bool SwappedOutMessages::CanHandleWhileSwappedOut(
+    const IPC::Message& msg) {
+  // We drop most other messages that arrive from a swapped out renderer.
+  // However, some are important (e.g., ACKs) for keeping the browser and
+  // renderer state consistent in case we later return to the renderer.
+  switch (msg.type()) {
     // Handled by RenderWidget.
     case ViewHostMsg_HandleInputEvent_ACK::ID:
     case ViewHostMsg_PaintAtSize_ACK::ID:
     case ViewHostMsg_UpdateRect::ID:
     // Handled by RenderView.
     case ViewHostMsg_RenderViewGone::ID:
     case ViewHostMsg_ShouldClose_ACK::ID:
     case ViewHostMsg_SwapOut_ACK::ID:
     case ViewHostMsg_ClosePage_ACK::ID:
-      return true;
-    default:
-      break;
-  }
-
-  // Check with the embedder as well.
-  ContentClient* client = GetContentClient();
-  return client->CanSendWhileSwappedOut(msg);
-}
-
-bool SwappedOutMessages::CanHandleWhileSwappedOut(
-    const IPC::Message& msg) {
-  // Any message the renderer is allowed to send while swapped out should
-  // be handled by the browser.
-  if (CanSendWhileSwappedOut(&msg))
-    return true;
-
-  // We drop most other messages that arrive from a swapped out renderer.
-  // However, some are important (e.g., ACKs) for keeping the browser and
-  // renderer state consistent in case we later return to the renderer.
-  switch (msg.type()) {
     // Sends an ACK.
     case ViewHostMsg_ShowView::ID:
     // Sends an ACK.
     case ViewHostMsg_ShowWidget::ID:
     // Sends an ACK.
     case ViewHostMsg_ShowFullscreenWidget::ID:
     // Updates browser state.
     case ViewHostMsg_RenderViewReady::ID:
     // Updates the previous navigation entry.
     case ViewHostMsg_UpdateState::ID:
     // Sends an ACK.
     case ViewHostMsg_UpdateTargetURL::ID:
     // We allow closing even if we are in the process of swapping out.
     case ViewHostMsg_Close::ID:
     // Sends an ACK.
     case ViewHostMsg_RequestMove::ID:
     // Suppresses dialog and sends an ACK.
     case ViewHostMsg_RunJavaScriptMessage::ID:
     // Suppresses dialog and sends an ACK.
     case ViewHostMsg_RunBeforeUnloadConfirm::ID:
     // Sends an ACK.
     case ViewHostMsg_AccessibilityNotifications::ID:
 #if defined(USE_X11)
     // Synchronous message when leaving a page with plugin.
     case ViewHostMsg_DestroyPluginContainer::ID:
 #endif
+    case ViewHostMsg_SendPostMessage::ID:
       return true;
     default:
       break;
   }
 
   // Check with the embedder as well.
   ContentClient* client = GetContentClient();
   return client->CanHandleWhileSwappedOut(msg);
 }
 
 }  // namespace content