Enable isolated worlds for content scripts....

chrome/renderer/user_script_slave.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/user_script_slave.h"
 
 #include "app/resource_bundle.h"
 #include "base/histogram.h"
 #include "base/logging.h"
 #include "base/perftimer.h"
@@ skipping 142 matching lines @@
         sources.insert(sources.begin(),
             WebScriptSource(WebString::fromUTF8(api_js_.as_string())));
       } else {
         // Setup chrome.self to contain an Extension object with the correct
         // ID.
         sources.insert(sources.begin(),
             WebScriptSource(WebString::fromUTF8(
                 StringPrintf(kInitExtension, script->extension_id().c_str()))));
       }
 
-      frame->ExecuteScriptInNewContext(&sources.front(), sources.size());
+      frame->ExecuteScriptInNewWorld(&sources.front(), sources.size());

[Aaron Boodman, 2009/07/16 18:27:14]

Whee! I'm on the edge of my seat :)

     }
   }
 
   // Log debug info.
   if (location == UserScript::DOCUMENT_START) {
     HISTOGRAM_COUNTS_100("UserScripts:DocStart:Count", num_matched);
     HISTOGRAM_TIMES("UserScripts:DocStart:Time", timer.Elapsed());
   } else {
     HISTOGRAM_COUNTS_100("UserScripts:DocEnd:Count", num_matched);
     HISTOGRAM_TIMES("UserScripts:DocEnd:Time", timer.Elapsed());
   }
 
   LOG(INFO) << "Injected " << num_matched << " user scripts into " <<
       frame->GetURL().spec();
   return true;
 }