Change the default implementation of ExtensionFunction::HasPermission to use

extensions/renderer/dispatcher.cc

 // Copyright 2014 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 "extensions/renderer/dispatcher.h"
 
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/command_line.h"
 #include "base/debug/alias.h"
@@ skipping 1153 matching lines @@
     }
   }
   return false;
 }
 
 Feature::Context Dispatcher::ClassifyJavaScriptContext(
     const Extension* extension,
     int extension_group,
     const GURL& url,
     const blink::WebSecurityOrigin& origin) {
+  // WARNING: This logic must match ProcessMap::GuessContextType, as much as
+  // possible.
+
   DCHECK_GE(extension_group, 0);
   if (extension_group == EXTENSION_GROUP_CONTENT_SCRIPTS) {
     return extension ?  // TODO(kalman): when does this happen?
                Feature::CONTENT_SCRIPT_CONTEXT
                      : Feature::UNSPECIFIED_CONTEXT;
   }
 
   // We have an explicit check for sandboxed pages before checking whether the
   // extension is active in this process because:
   // 1. Sandboxed pages run in the same process as regular extension pages, so
@@ skipping 101 matching lines @@
     return v8::Handle<v8::Object>();
 
   if (bind_name)
     *bind_name = split.back();
 
   return bind_object.IsEmpty() ? AsObjectOrEmpty(GetOrCreateChrome(context))
                                : bind_object;
 }
 
 }  // namespace extensions