Get rid of dependencies on v8.h in public header files

src/FileSystemJsObject.cpp

Index: src/FileSystemJsObject.cpp
===================================================================
--- a/src/FileSystemJsObject.cpp
+++ b/src/FileSystemJsObject.cpp
@@ -17,17 +17,17 @@
 
 #include <AdblockPlus/FileSystem.h>
 #include <stdexcept>
 #include <sstream>
 #include <vector>
 
 #include <AdblockPlus/JsValue.h>
 #include "FileSystemJsObject.h"
-#include "Utils.h"
+#include "JsContext.h"
 #include "Thread.h"
 #include "Utils.h"
 
 using namespace AdblockPlus;
 
 namespace
 {
   class IoThread : public Thread
@@ -67,17 +67,17 @@ namespace
       {
         error = e.what();
       }
       catch (...)
       {
         error =  "Unknown error while reading from " + path;
       }
 
-      const JsEngine::Context context(jsEngine);
+      const JsContext context(jsEngine);
       JsValuePtr result = jsEngine->NewObject();
       result->SetProperty("content", content);
       result->SetProperty("error", error);
       JsValueList params;
       params.push_back(result);
       callback->Call(params);
       delete this;
     }
@@ -108,17 +108,17 @@ namespace
       {
         error = e.what();
       }
       catch (...)
       {
         error = "Unknown error while writing to " + path;
       }
 
-      const JsEngine::Context context(jsEngine);
+      const JsContext context(jsEngine);
       JsValuePtr errorValue = jsEngine->NewValue(error);
       JsValueList params;
       params.push_back(errorValue);
       callback->Call(params);
       delete this;
     }
 
   private:
@@ -146,17 +146,17 @@ namespace
       {
         error = e.what();
       }
       catch (...)
       {
         error = "Unknown error while moving " + fromPath + " to " + toPath;
       }
 
-      const JsEngine::Context context(jsEngine);
+      const JsContext context(jsEngine);
       JsValuePtr errorValue = jsEngine->NewValue(error);
       JsValueList params;
       params.push_back(errorValue);
       callback->Call(params);
       delete this;
     }
 
   private:
@@ -184,17 +184,17 @@ namespace
       {
         error = e.what();
       }
       catch (...)
       {
         error = "Unknown error while removing " + path;
       }
 
-      const JsEngine::Context context(jsEngine);
+      const JsContext context(jsEngine);
       JsValuePtr errorValue = jsEngine->NewValue(error);
       JsValueList params;
       params.push_back(errorValue);
       callback->Call(params);
       delete this;
     }
 
   private:
@@ -223,17 +223,17 @@ namespace
       {
         error = e.what();
       }
       catch (...)
       {
         error = "Unknown error while calling stat on " + path;
       }
 
-      const JsEngine::Context context(jsEngine);
+      const JsContext context(jsEngine);
       JsValuePtr result = jsEngine->NewObject();
       result->SetProperty("exists", statResult.exists);
       result->SetProperty("isFile", statResult.isFile);
       result->SetProperty("isDirectory", statResult.isDirectory);
       result->SetProperty("lastModified", statResult.lastModified);
       result->SetProperty("error", error);
 
       JsValueList params;