Rename ErrorCallback into LogSystem, provide a proper console API

include/AdblockPlus/JsEngine.h

Index: include/AdblockPlus/JsEngine.h
===================================================================
--- a/include/AdblockPlus/JsEngine.h
+++ b/include/AdblockPlus/JsEngine.h
@@ -18,17 +18,17 @@
 #ifndef ADBLOCK_PLUS_JS_ENGINE_H
 #define ADBLOCK_PLUS_JS_ENGINE_H
 
 #include <stdexcept>
 #include <stdint.h>
 #include <string>
 #include <v8.h>
 #include <AdblockPlus/AppInfo.h>
-#include <AdblockPlus/ErrorCallback.h>
+#include <AdblockPlus/LogSystem.h>
 #include <AdblockPlus/FileSystem.h>
 #include <AdblockPlus/JsValue.h>
 #include <AdblockPlus/WebRequest.h>
 
 #include "tr1_memory.h"
 
 namespace AdblockPlus
 {
@@ -72,18 +72,18 @@ namespace AdblockPlus
     JsValuePtr NewCallback(v8::InvocationCallback callback);
     static JsEnginePtr FromArguments(const v8::Arguments& arguments);
     JsValueList ConvertArguments(const v8::Arguments& arguments);
 
     FileSystemPtr GetFileSystem();
     void SetFileSystem(FileSystemPtr val);
     WebRequestPtr GetWebRequest();
     void SetWebRequest(WebRequestPtr val);
-    ErrorCallbackPtr GetErrorCallback();
-    void SetErrorCallback(ErrorCallbackPtr val);
+    LogSystemPtr GetLogSystem();
+    void SetLogSystem(LogSystemPtr val);
 
     class Context
     {
     public:
       Context(const JsEnginePtr jsEngine);
       virtual inline ~Context() {};
 
     private:
@@ -92,15 +92,15 @@ namespace AdblockPlus
       const v8::Context::Scope contextScope;
     };
 
   private:
     JsEngine();
 
     FileSystemPtr fileSystem;
     WebRequestPtr webRequest;
-    ErrorCallbackPtr errorCallback;
+    LogSystemPtr logSystem;
     v8::Isolate* isolate;
     v8::Persistent<v8::Context> context;
   };
 }
 
 #endif