Add command to initiate garbage collection

src/JsEngine.cpp

 #include <AdblockPlus.h>
 #include <sstream>
 
 #include "ConsoleJsObject.h"
 
 namespace
 {
   v8::Handle<v8::Context> CreateContext(
     AdblockPlus::ErrorCallback& errorCallback)
   {
@@ skipping 55 matching lines @@
   const v8::Context::Scope contextScope(context);
   const v8::Local<v8::Object> global = context->Global();
   const v8::Local<v8::Function> function = v8::Local<v8::Function>::Cast(
     global->Get(v8::String::New(functionName.c_str())));
   const v8::TryCatch tryCatch;
   const v8::Local<v8::Value> result = function->Call(function, 0, 0);
   CheckTryCatch(tryCatch);
   const v8::String::AsciiValue ascii(result);
   return *ascii;
 }
+
+void AdblockPlus::JsEngine::Gc()
+{
+  while (!v8::V8::IdleNotification());
+}