Allow content script insertion on about:-URLs.

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 206 matching lines @@
     if (frame->parent() && !script->match_all_frames())
       continue;  // Only match subframes if the script declared it wanted to.
 
     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;
 
+    if (data_source_url.SchemeIs(content::kAboutScheme)) {
+      if (!script->MatchesURL(data_source_url))
+        continue;
+
+      // about:-documents can access their creator's document, so (dis)allow
+      // access to the frame based on the creator's URL.
+      GURL document_origin_url(frame->document().securityOrigin().toString());
+      if (document_origin_url.is_valid())
+        data_source_url = document_origin_url;

[not at google - send to devlin, 2014/04/18 16:04:55]

pull this logic out into a helper function and use that from
user_script_scheduler.cc.

+    }
+
     // Content scripts are not tab-specific.
     const int kNoTabId = -1;
     // We don't have a process id in this context.
     const int kNoProcessId = -1;
     if (!PermissionsData::CanExecuteScriptOnPage(extension,
                                                  data_source_url,
                                                  frame->top()->document().url(),
                                                  kNoTabId,
                                                  script,
                                                  kNoProcessId,
@@ skipping 81 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