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

content/browser/transition_request_message_filter.h

Index: content/browser/transition_request_message_filter.h
diff --git a/content/browser/transition_request_message_filter.h b/content/browser/transition_request_message_filter.h
new file mode 100644
index 0000000000000000000000000000000000000000..de09d69eda045f104119cbb70dde9a19b9bdaa83
--- /dev/null
+++ b/content/browser/transition_request_message_filter.h
@@ -0,0 +1,34 @@
+// 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.
+
+#ifndef CONTENT_BROWSER_TRANSITION_REQUEST_MESSAGE_FILTER_H_
+#define CONTENT_BROWSER_TRANSITION_REQUEST_MESSAGE_FILTER_H_
+
+#include "base/callback_forward.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/memory/weak_ptr.h"
+#include "content/common/content_export.h"
+#include "content/public/browser/browser_message_filter.h"
+#include "webkit/common/resource_type.h"
+
+namespace content {
+
+class TransitionRequestMessageFilter : public BrowserMessageFilter {
+ public:
+  TransitionRequestMessageFilter(int processId);
+
+  // BrowserMessageFilter implementation.
+  virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
+
+ private:
+  virtual ~TransitionRequestMessageFilter();
+
+  int process_id_;
+
+  DISALLOW_COPY_AND_ASSIGN(TransitionRequestMessageFilter);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_TRANSITION_REQUEST_MESSAGE_FILTER_H_