Don't use process isolation for bookmark apps.

chrome/common/extensions/extension_set.cc

 // Copyright (c) 2011 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/common/extensions/extension_set.h"
 
 #include "base/logging.h"
 #include "chrome/common/url_constants.h"
 
 ExtensionSet::ExtensionSet() {
@@ skipping 28 matching lines @@
 
   return extension->id();
 }
 
 const Extension* ExtensionSet::GetByURL(const GURL& url) const {
   if (url.SchemeIs(chrome::kExtensionScheme))
     return GetByID(url.host());
 
   ExtensionMap::const_iterator i = extensions_.begin();
   for (; i != extensions_.end(); ++i) {
-    if (i->second->web_extent().MatchesURL(url))
+    // Exclude bookmark apps so that they do not affect the process model.
+    // TODO(creis): Where is the right place to do this exclusion?
+    if (i->second->web_extent().MatchesURL(url) &&
+        !i->second->from_bookmark()) {
       return i->second.get();
+    }
   }
 
   return NULL;
 }
 
 bool ExtensionSet::InSameExtent(const GURL& old_url,
                                 const GURL& new_url) const {
   return GetByURL(old_url) == GetByURL(new_url);
 }
 
@@ skipping 11 matching lines @@
 
   ExtensionMap::const_iterator i = extensions_.begin();
   for (; i != extensions_.end(); ++i) {
     if (i->second->location() == Extension::COMPONENT &&
         i->second->web_extent().MatchesURL(url))
       return true;
   }
 
   return false;
 }