An internal intents dispatcher useful for initiating an intent from the browser process.

content/browser/intents/internal_web_intents_dispatcher.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 "content/browser/intents/internal_web_intents_dispatcher.h"
+
+#include "content/browser/intents/intent_injector.h"
+#include "webkit/glue/web_intent_data.h"
+#include "webkit/glue/web_intent_reply_data.h"
+
+using content::WebContents;
+
+InternalWebIntentsDispatcher::InternalWebIntentsDispatcher(
+    const webkit_glue::WebIntentData& intent)
+    : intent_(intent),
+      intent_injector_(NULL) {}
+
+InternalWebIntentsDispatcher::InternalWebIntentsDispatcher(
+    const webkit_glue::WebIntentData& intent,
+    base::Callback<void(webkit_glue::WebIntentReplyType,
+                        const string16&)> reply_callback)
+    : intent_(intent),
+      intent_injector_(NULL),
+      reply_callback_(reply_callback) {}
+
+InternalWebIntentsDispatcher::~InternalWebIntentsDispatcher() {}
+
+const webkit_glue::WebIntentData& InternalWebIntentsDispatcher::GetIntent() {
+  return intent_;
+}
+
+void InternalWebIntentsDispatcher::DispatchIntent(
+    WebContents* destination_tab) {

[James Hawkins, 2012/03/12 23:19:11]

WebIntentsDispatcher doesn't document this, but must |destination_tab| be
non-NULL?  If so, add that documentation to the interface and DCHECK
|destination_tab| here.

[Greg Billock, 2012/03/12 23:52:22]

Done.

+  DCHECK(!intent_injector_);
+  intent_injector_ = new IntentInjector(destination_tab);
+  intent_injector_->SetIntent(this, intent_);
+}
+
+void InternalWebIntentsDispatcher::SendReplyMessage(
+    webkit_glue::WebIntentReplyType reply_type,
+    const string16& data) {
+  intent_injector_ = NULL;
+
+  for (size_t i = 0; i < reply_notifiers_.size(); ++i) {
+    if (!reply_notifiers_[i].is_null())
+      reply_notifiers_[i].Run(reply_type);
+  }
+
+  // Notify the callback of the reply.
+  if (!reply_callback_.is_null())
+    reply_callback_.Run(reply_type, data);
+
+  delete this;

[James Hawkins, 2012/03/12 23:19:11]

What happens if SendReplyMessage is never called?

[Greg Billock, 2012/03/12 23:52:22]

The dispatcher lasts as long as the intent is active. It is the responsibility
of the embedder to send a reply message when the intent becomes inactive. I
clarified the header language to make this more clear.

+}
+
+void InternalWebIntentsDispatcher::RegisterReplyNotification(
+    const base::Callback<void(webkit_glue::WebIntentReplyType)>& closure) {
+  reply_notifiers_.push_back(closure);
+}