Fix bug where content scripts can get GC'd if they don't attach

chrome/renderer/extensions/bindings_utils.cc

 // Copyright (c) 2009 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/renderer/extensions/bindings_utils.h"
 
 #include "base/string_util.h"
 #include "chrome/renderer/render_view.h"
 #include "webkit/api/public/WebFrame.h"
 
@@ skipping 53 matching lines @@
 
   for (ContextList::iterator it = all_contexts.begin();
        it != all_contexts.end(); ++it) {
      if ((*it)->extension_id == extension_id)
        contexts.push_back(*it);
   }
 
   return contexts;
 }
 
+ContextInfo* GetInfoForCurrentContext() {
+  v8::Local<v8::Context> context = v8::Context::GetCurrent();
+  ContextList::iterator context_iter = FindContext(context);
+  if (context_iter == GetContexts().end())
+    return NULL;
+  else
+    return context_iter->get();
+}
+
 ContextList::iterator FindContext(v8::Handle<v8::Context> context) {
   ContextList& all_contexts = GetContexts();
 
   ContextList::iterator it = all_contexts.begin();
   for (; it != all_contexts.end(); ++it) {
     if ((*it)->context == context)
       break;
   }
 
   return it;
@@ skipping 39 matching lines @@
   }
 
   v8::Local<v8::Function> function = v8::Local<v8::Function>::Cast(value);
   if (!function.IsEmpty())
     return function->Call(v8::Object::New(), argc, argv);
 
   return v8::Undefined();
 }
 
 }  // namespace bindings_utils