Navigation transitions: Block first response until after transitions have run.

content/browser/transition_request_message_filter.cc

Index: content/browser/transition_request_message_filter.cc
diff --git a/content/browser/transition_request_message_filter.cc b/content/browser/transition_request_message_filter.cc
new file mode 100644
index 0000000000000000000000000000000000000000..7f409be988c0fefd91d05b5b26c896828b8dcf43
--- /dev/null
+++ b/content/browser/transition_request_message_filter.cc
@@ -0,0 +1,37 @@
+// Copyright 2014 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/browser/transition_request_message_filter.h"
+
+#include "content/browser/transition_request_manager.h"
+#include "content/common/transition_request_messages.h"
+
+namespace content {
+
+TransitionRequestMessageFilter::TransitionRequestMessageFilter(int process_id)
+    : BrowserMessageFilter(TransitionRequestMsgStart),
+      process_id_(process_id) {
+}
+
+TransitionRequestMessageFilter::~TransitionRequestMessageFilter() {
+}
+
+bool TransitionRequestMessageFilter::OnMessageReceived(
+    const IPC::Message& message) {
+  switch (message.type()) {
+    case TransitionRequestHostMsg_SetHasPendingTransitionRequest::ID: {
+      TransitionRequestHostMsg_SetHasPendingTransitionRequest::Param param;
+      if (!TransitionRequestHostMsg_SetHasPendingTransitionRequest::Read(
+          &message, &param))
+        return true;
+      TransitionRequestManager::GetInstance()->SetHasPendingTransitionRequest(
+          process_id_, message.routing_id(), param.a);
+    }
+    default:
+      break;
+  }
+  return true;
+}
+
+}  // namespace content