Add OnCompileError handler and v8::CompileError debug event

src/debug.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.
 
 #ifndef V8_DEBUG_H_
 #define V8_DEBUG_H_
 
 #include "allocation.h"
 #include "arguments.h"
 #include "assembler.h"
@@ skipping 762 matching lines @@
       bool uncaught,
       Handle<Object> promise);
   MUST_USE_RESULT MaybeHandle<Object> MakeCompileEvent(
       Handle<Script> script, bool before);
   MUST_USE_RESULT MaybeHandle<Object> MakeScriptCollectedEvent(int id);
 
   void OnDebugBreak(Handle<Object> break_points_hit, bool auto_continue);
   void OnException(Handle<Object> exception,
                    bool uncaught,
                    Handle<Object> promise = Handle<Object>::null());
+  void OnSyntaxError(Handle<Script> script);
   void OnBeforeCompile(Handle<Script> script);
 
   enum AfterCompileFlags {
     NO_AFTER_COMPILE_FLAGS,
     SEND_WHEN_DEBUGGING
   };
   void OnAfterCompile(Handle<Script> script,
                       AfterCompileFlags after_compile_flags);
   void OnScriptCollected(int id);
   void ProcessDebugEvent(v8::DebugEvent event,
@@ skipping 243 matching lines @@
   Mutex mutex_;
   bool already_signalled_;
 
   DISALLOW_COPY_AND_ASSIGN(MessageDispatchHelperThread);
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_DEBUG_H_