Added check to prevent extensions from injecting scrips into other extensions

chrome/renderer/extensions/user_script_slave.cc

 // Copyright (c) 2012 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/user_script_slave.h"
 
 #include <map>
 
 #include "base/command_line.h"
 #include "base/logging.h"
@@ skipping 263 matching lines @@
     const Extension* extension = extensions_->GetByID(script->extension_id());
 
     // Since extension info is sent separately from user script info, they can
     // be out of sync. We just ignore this situation.
     if (!extension)
       continue;
 
     // Content scripts are not tab-specific.
     int kNoTabId = -1;
     if (!extension->CanExecuteScriptOnPage(data_source_url,
+                                           frame->top()->document().url(),
                                            kNoTabId,
                                            script,
                                            NULL)) {
       continue;
     }
 
     // We rely on WebCore for CSS injection, but it's still useful to know how
     // many css files there are.
     if (location == UserScript::DOCUMENT_START)
       num_css += script->css_scripts().size();
@@ skipping 66 matching lines @@
   } else if (location == UserScript::DOCUMENT_IDLE) {
     UMA_HISTOGRAM_COUNTS_100("Extensions.InjectIdle_ScriptCount", num_scripts);
     if (num_scripts)
       UMA_HISTOGRAM_TIMES("Extensions.InjectIdle_Time", timer.Elapsed());
   } else {
     NOTREACHED();
   }
 }
 
 }  // namespace extensions