<webview>: Add support for filtering extension events by instanceId.

chrome/renderer/extensions/event_bindings.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/event_bindings.h"
 
 #include <vector>
 
 #include "base/bind.h"
 #include "base/basictypes.h"
@@ skipping 284 matching lines @@
     args.GetReturnValue().Set(array);
   }
 
   static EventFilteringInfo ParseFromObject(v8::Handle<v8::Object> object) {
     EventFilteringInfo info;
     v8::Handle<v8::String> url(v8::String::New("url"));
     if (object->Has(url)) {
       v8::Handle<v8::Value> url_value(object->Get(url));
       info.SetURL(GURL(*v8::String::AsciiValue(url_value)));
     }
+    v8::Handle<v8::String> instance_id(v8::String::New("instanceId"));
+    if (object->Has(instance_id)) {
+      v8::Handle<v8::Value> instance_id_value(object->Get(instance_id));
+      info.SetInstanceID(instance_id_value->IntegerValue());
+    }
     return info;
   }
 
  private:
   static bool IsLazyBackgroundPage(content::RenderView* render_view,
                                    const Extension* extension) {
     if (!render_view)
       return false;
     ExtensionHelper* helper = ExtensionHelper::Get(render_view);
     return (extension && BackgroundInfo::HasLazyBackgroundPage(extension) &&
             helper->view_type() == VIEW_TYPE_EXTENSION_BACKGROUND_PAGE);
   }
 
   static scoped_ptr<EventMatcher> ParseEventMatcher(
       base::DictionaryValue* filter_dict) {
     return scoped_ptr<EventMatcher>(new EventMatcher(
         scoped_ptr<base::DictionaryValue>(filter_dict->DeepCopy())));
   }
 };
 
 }  // namespace
 
 // static
 ChromeV8Extension* EventBindings::Create(Dispatcher* dispatcher,
                                          ChromeV8Context* context) {
   return new ExtensionImpl(dispatcher, context);
 }
 
 }  // namespace extensions