Fix crashing bugs when dart code executed inside the debugger triggers breakpoints

Source/bindings/dart/DartDebugServer.cpp

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 420 matching lines @@
         "return "),
         expression);
     expression = v8::String::Concat(expression, v8::String::New("} })"));
 
     v8::Handle<v8::Script> script = v8::Script::Compile(expression);
     if (script.IsEmpty()) // Return immediately in case of exception to let the caller handle it.
         return v8::Handle<v8::Value>();
     v8::Debug::GetDebugContext()->Enter();
     v8::Handle<v8::Function> function = script->Run().As<v8::Function>();
     v8::Debug::GetDebugContext()->Exit();
-    Dart_ExceptionPauseInfo previousPauseInfo = Dart_GetExceptionPauseInfo();
-    // FIXME: it is not clear this is the right long term solution but for now
-    // we prevent pausing on exceptions when executing an evaluate statement to
-    // avoid crashing debug dartium builds.
-    Dart_SetExceptionPauseInfo(kNoPauseOnExceptions);
     v8::Handle<v8::Value> ret = function->Call(receiver, 2, scopes);
-    Dart_SetExceptionPauseInfo(previousPauseInfo);
     return ret;
 }
 
 void DartDebugServer::ensureHooksInstalled()
 {
     DEFINE_STATIC_LOCAL(bool, hooksInstalled, (false));
 
     if (hooksInstalled)
         return;
 
@@ skipping 21 matching lines @@
     nativeCallbacks->Set(v8::String::New("getBreakpointLine"), v8::FunctionTemplate::New(&getBreakpointLine)->GetFunction());
     nativeCallbacks->Set(v8::String::New("setExceptionPauseInfo"), v8::FunctionTemplate::New(&setExceptionPauseInfo)->GetFunction());
     nativeCallbacks->Set(v8::String::New("stepInto"), v8::FunctionTemplate::New(&stepInto)->GetFunction());
     nativeCallbacks->Set(v8::String::New("stepOver"), v8::FunctionTemplate::New(&stepOver)->GetFunction());
     nativeCallbacks->Set(v8::String::New("stepOut"), v8::FunctionTemplate::New(&stepOut)->GetFunction());
     nativeCallbacks->Set(v8::String::New("evaluateInScope"), evaluateInScopeFunction);
     m_dartDebugObject.get()->Set(v8::String::New("nativeCallbacks"), nativeCallbacks);
 }
 
 }