Revert of [wasm] Initial signal handler

include/v8.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 /** \mainpage V8 API Reference Guide
  *
  * V8 is Google's open source JavaScript engine.
  *
  * This set of documents provides reference material generated from the
  * V8 header file, include/v8.h.
@@ skipping 7675 matching lines @@
    * initialized.
    */
   static void InitializePlatform(Platform* platform);
 
   /**
    * Clears all references to the v8::Platform. This should be invoked after
    * V8 was disposed.
    */
   static void ShutdownPlatform();
 
-#if V8_OS_LINUX && V8_TARGET_ARCH_X64
-  /**
-   * Give the V8 signal handler a chance to handle a fault.
-   *
-   * This function determines whether a memory access violation can be recovered
-   * by V8. If so, it will return true and modify context to return to a code
-   * fragment that can recover from the fault. Otherwise, TryHandleSignal will
-   * return false.
-   *
-   * The parameters to this function correspond to those passed to a Linux
-   * signal handler.
-   *
-   * \param signal_number The signal number.
-   *
-   * \param info A pointer to the siginfo_t structure provided to the signal
-   * handler.
-   *
-   * \param context The third argument passed to the Linux signal handler, which
-   * points to a ucontext_t structure.
-   */
-  static bool TryHandleSignal(int signal_number, void* info, void* context);
-#endif  // V8_OS_LINUX
-
-  /**
-   * Enable the default signal handler rather than using one provided by the
-   * embedder.
-   */
-  static bool RegisterDefaultSignalHandler();
-
  private:
   V8();
 
   static internal::Object** GlobalizeReference(internal::Isolate* isolate,
                                                internal::Object** handle);
   static internal::Object** CopyPersistent(internal::Object** handle);
   static void DisposeGlobal(internal::Object** global_handle);
   static void MakeWeak(internal::Object** location, void* data,
                        WeakCallbackInfo<void>::Callback weak_callback,
                        WeakCallbackType type);
@@ skipping 2197 matching lines @@
  */
 
 
 }  // namespace v8
 
 
 #undef TYPE_CHECK
 
 
 #endif  // INCLUDE_V8_H_