Support custom V8 bindings on WebWorker threads (issue #451).

- Add CefRenderProcessHandler callbacks for WebWorker context creation, release and uncaught exceptions.
- Add CefTaskRunner class that supports posting of tasks to standard threads and WebWorker threads.
- Organize V8 internal state information on a per-thread/per-Isolate basis.
- Add webkit_451.patch that provides the WebKit implementation.

git-svn-id: https://chromiumembedded.googlecode.com/svn/trunk@972 5089003a-bbd8-11dd-ad1f-f1f9622dbc98

libcef_dll/cpptoc/task_runner_cpptoc.h

@@ -0,0 +1,36 @@
+// Copyright (c) 2013 The Chromium Embedded Framework Authors. All rights
+// reserved. Use of this source code is governed by a BSD-style license that
+// can be found in the LICENSE file.
+//
+// ---------------------------------------------------------------------------
+//
+// This file was generated by the CEF translator tool. If making changes by
+// hand only do so within the body of existing method and function
+// implementations. See the translator.README.txt file in the tools directory
+// for more information.
+//
+
+#ifndef CEF_LIBCEF_DLL_CPPTOC_TASK_RUNNER_CPPTOC_H_
+#define CEF_LIBCEF_DLL_CPPTOC_TASK_RUNNER_CPPTOC_H_
+#pragma once
+
+#ifndef BUILDING_CEF_SHARED
+#pragma message("Warning: "__FILE__" may be accessed DLL-side only")
+#else  // BUILDING_CEF_SHARED
+
+#include "include/cef_task.h"
+#include "include/capi/cef_task_capi.h"
+#include "libcef_dll/cpptoc/cpptoc.h"
+
+// Wrap a C++ class with a C structure.
+// This class may be instantiated and accessed DLL-side only.
+class CefTaskRunnerCppToC
+    : public CefCppToC<CefTaskRunnerCppToC, CefTaskRunner, cef_task_runner_t> {
+ public:
+  explicit CefTaskRunnerCppToC(CefTaskRunner* cls);
+  virtual ~CefTaskRunnerCppToC() {}
+};
+
+#endif  // BUILDING_CEF_SHARED
+#endif  // CEF_LIBCEF_DLL_CPPTOC_TASK_RUNNER_CPPTOC_H_
+