Attempting to fix problems in 11571014.

chrome/renderer/extensions/module_system.h

Index: chrome/renderer/extensions/module_system.h
diff --git a/chrome/renderer/extensions/module_system.h b/chrome/renderer/extensions/module_system.h
index 2521d678b13579c81d591711ac2211c75cb9e89c..9f3d602600fba167384da20ccbf8a49e1a6e86d1 100644
--- a/chrome/renderer/extensions/module_system.h
+++ b/chrome/renderer/extensions/module_system.h
@@ -64,9 +64,6 @@ class ModuleSystem : public ObjectBackedNativeHandler {
   ModuleSystem(v8::Handle<v8::Context> context, SourceMap* source_map);
   virtual ~ModuleSystem();
 
-  // Returns true if the current context has a ModuleSystem installed in it.
-  static bool IsPresentInCurrentContext();
-
   // Dumps the debug info from |try_catch| to LOG(ERROR).
   static void DumpException(const v8::TryCatch& try_catch);
 
@@ -130,7 +127,9 @@ class ModuleSystem : public ObjectBackedNativeHandler {
     exception_handler_ = handler.Pass();
   }
 
-  virtual bool Invalidate() OVERRIDE;
+ protected:
+  friend class ChromeV8Context;
+  virtual void Invalidate() OVERRIDE;
 
  private:
   typedef std::map<std::string, linked_ptr<NativeHandler> > NativeHandlerMap;
@@ -158,14 +157,14 @@ class ModuleSystem : public ObjectBackedNativeHandler {
                     const std::string& module_field,
                     v8::AccessorGetter getter);
 
-  typedef v8::Handle<v8::Value> (ModuleSystem::*GetModuleFunc)(
+  typedef v8::Handle<v8::Value> (ModuleSystem::*RequireFunction)(
       const std::string&);
-  // Base implementation of a LazyFieldGetter that can be customized by passing
-  // in a |get_module| function.
+  // Base implementation of a LazyFieldGetter which uses |require_fn| to require
+  // modules.
   static v8::Handle<v8::Value> LazyFieldGetterInner(
       v8::Local<v8::String> property,
       const v8::AccessorInfo& info,
-      GetModuleFunc get_module);
+      RequireFunction require_function);
 
   // Return the named source file stored in the source map.
   // |args[0]| - the name of a source file in source_map_.
@@ -194,9 +193,6 @@ class ModuleSystem : public ObjectBackedNativeHandler {
   // pinned natives as enabled.
   int natives_enabled_;
 
-  // Set to false if |context_| has been deleted and this should not be used.
-  bool is_valid_;
-
   // Called when an exception is thrown but not caught in JS.
   scoped_ptr<ExceptionHandler> exception_handler_;