Don't serialize extension user script injection results unless the extension

chrome/renderer/extensions/chrome_v8_context_set.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/chrome_v8_context_set.h"
 
 #include "base/logging.h"
 #include "base/message_loop/message_loop.h"
 #include "base/tracked_objects.h"
 #include "base/values.h"
@@ skipping 58 matching lines @@
   return calling.IsEmpty() ? NULL : GetByV8Context(calling);
 }
 
 ChromeV8Context* ChromeV8ContextSet::GetByV8Context(
     v8::Handle<v8::Context> v8_context) const {
   for (ContextSet::const_iterator iter = contexts_.begin();
        iter != contexts_.end(); ++iter) {
     if ((*iter)->v8_context() == v8_context)
       return *iter;
   }
-
   return NULL;
 }
 
+ChromeV8Context* ChromeV8ContextSet::GetByWebFrame(
+    WebKit::WebFrame* web_frame) const {
+  for (ContextSet::const_iterator iter = contexts_.begin();
+       iter != contexts_.end(); ++iter) {
+    if ((*iter)->web_frame() == web_frame)
+      return *iter;
+  }
+  return NULL;
+}
+
 void ChromeV8ContextSet::ForEach(
     const std::string& extension_id,
     content::RenderView* render_view,
     const base::Callback<void(ChromeV8Context*)>& callback) const {
   // We copy the context list, because calling into javascript may modify it
   // out from under us.
   ContextSet contexts = GetAll();
 
   for (ContextSet::iterator it = contexts.begin(); it != contexts.end();
        ++it) {
@@ skipping 34 matching lines @@
       (*it)->DispatchOnUnloadEvent();
       removed.insert(*it);
       Remove(*it);
     }
   }
 
   return removed;
 }
 
 }  // namespace extensions