implement remaining tab events (except for onTabUpdated).

chrome/browser/extensions/extension_browser_event_router.h

Index: chrome/browser/extensions/extension_browser_event_router.h
===================================================================
--- chrome/browser/extensions/extension_browser_event_router.h	(revision 14176)
+++ chrome/browser/extensions/extension_browser_event_router.h	(working copy)
@@ -6,6 +6,7 @@
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_BROWSER_EVENT_ROUTER_H_
 
 #include <vector>
+#include <set>
 #include <string>
 
 #include "base/basictypes.h"
@@ -49,6 +50,10 @@
 
   bool initialized_;
 
+  // Maintain set of known tab ids, so we can distinguish between tab creation
+  // and tab insertion. Also used to not send tab-detached after tab-removed.

[Matt Perry, 2009/04/22 18:20:17]

nit: "Also used to avoid sending"

+  std::set<int> tab_ids_;
+
   DISALLOW_COPY_AND_ASSIGN(ExtensionBrowserEventRouter);
 };