Remove more calls to HandleScope default ctor.

chrome/renderer/extensions/content_watcher.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/common/extensions/extension_messages.h"
 #include "chrome/renderer/extensions/chrome_v8_context.h"
 #include "chrome/renderer/extensions/chrome_v8_extension.h"
 #include "chrome/renderer/extensions/content_watcher.h"
 #include "chrome/renderer/extensions/dispatcher.h"
 #include "content/public/renderer/render_view.h"
@@ skipping 80 matching lines @@
 void ContentWatcher::DidCreateDocumentElement(WebKit::WebFrame* frame) {
   // Make sure the frame is represented in the matching_selectors_ map.
   matching_selectors_[frame];
 
   if (!css_selectors_.empty()) {
     EnsureWatchingMutations(frame);
   }
 }
 
 void ContentWatcher::EnsureWatchingMutations(WebKit::WebFrame* frame) {
-  v8::HandleScope scope;
+  v8::HandleScope scope(v8::Isolate::GetCurrent());
   v8::Context::Scope context_scope(frame->mainWorldScriptContext());
   if (ModuleSystem* module_system = GetModuleSystem(frame)) {
     ModuleSystem::NativesEnabledScope scope(module_system);
     module_system->Require("contentWatcher");
   }
 }
 
 ModuleSystem* ContentWatcher::GetModuleSystem(WebKit::WebFrame* frame) const {
   ChromeV8Context* v8_context =
       dispatcher_->v8_context_set().GetByV8Context(
@@ skipping 61 matching lines @@
            it = transitive_selectors.begin();
        it != transitive_selectors.end(); ++it)
     selector_strings.push_back(it->as_string());
   content::RenderView* view =
       content::RenderView::FromWebView(top_frame->view());
   view->Send(new ExtensionHostMsg_OnWatchedPageChange(
       view->GetRoutingID(), selector_strings));
 }
 
 }  // namespace extensions