Make functions being routed by NativeHandlers throw an exception if there is no ModuleSystem in the…

chrome/renderer/native_handler.cc

Index: chrome/renderer/native_handler.cc
diff --git a/chrome/renderer/native_handler.cc b/chrome/renderer/native_handler.cc
index a09486b604a1704f38ec8f096cb38754ecda6ced..91c0ff582b9227fea69559b2619dcb89a5dd8131 100644
--- a/chrome/renderer/native_handler.cc
+++ b/chrome/renderer/native_handler.cc
@@ -6,6 +6,7 @@
 
 #include "base/memory/linked_ptr.h"
 #include "base/logging.h"
+#include "chrome/renderer/module_system.h"
 #include "v8/include/v8.h"
 
 NativeHandler::NativeHandler()
@@ -25,6 +26,9 @@ v8::Handle<v8::Object> NativeHandler::NewInstance() {
 v8::Handle<v8::Value> NativeHandler::Router(const v8::Arguments& args) {
   HandlerFunction* handler_function = static_cast<HandlerFunction*>(
       args.Data().As<v8::External>()->Value());
+  if (!ModuleSystem::IsPresentInCurrentContext())
+    return v8::ThrowException(v8::Exception::Error(
+        v8::String::New("ModuleSystem has been deleted")));

[not at google - send to devlin, 2012/04/24 05:15:29]

nit: braces around multi-line-single-statement if statements.

it also seems.. better.. for this to be the first thing that runs in this
method, rather than after grabbing the handler function. And... also a comment
why the check is necessary would be nice.

[koz (OOO until 15th September), 2012/04/24 05:35:20]

Done.

   return handler_function->Run(args);
 }