First steps towards webRequest extension API.

Only an asynchronous version of onBeforeRequest is implement, with
limited data being passed.

BUG=60101
TEST=no

Review URL: http://codereview.chromium.org/6288014

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@73196 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 40 insertions, 0 deletions

diff --git a/chrome/browser/extensions/extension_io_event_router.h b/chrome/browser/extensions/extension_io_event_router.h
new file mode 100755
index 0000000..1a27890
--- /dev/null
+++ b/chrome/browser/extensions/extension_io_event_router.h
@@ -0,0 +1,40 @@
+// 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.
+
+#ifndef CHROME_BROWSER_EXTENSIONS_EXTENSION_IO_EVENT_ROUTER_H_
+#define CHROME_BROWSER_EXTENSIONS_EXTENSION_IO_EVENT_ROUTER_H_
+#pragma once
+
+#include <string>
+
+#include "base/ref_counted.h"
+
+class Profile;
+
+// For now, this just forwards events from the IO thread to the
+// ExtensionEventRouter on the UI thread.
+// TODO(mpcomplete): eventually I want this to have its own copy of the event
+// listeners so it can bypass the jump to the UI thread.
+class ExtensionIOEventRouter
+    : public base::RefCountedThreadSafe<ExtensionIOEventRouter> {
+ public:
+  explicit ExtensionIOEventRouter(Profile* profile);
+  ~ExtensionIOEventRouter();
+
+  void DestroyingProfile() { profile_ = NULL; }
+
+  // Dispatch the named event to every extension listening to that event.
+  void DispatchEvent(const std::string& event_name,
+                     const std::string& event_args) const;
+
+ private:
+  Profile* profile_;
+
+  void DispatchEventOnUIThread(const std::string& event_name,
+                               const std::string& event_args) const;
+
+  DISALLOW_COPY_AND_ASSIGN(ExtensionIOEventRouter);
+};
+
+#endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_IO_EVENT_ROUTER_H_