Remove the event URL security check out of the renderer and into the browser.

chrome/common/extensions/extension_messages.h

 // 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.
 
 // IPC messages for extensions.
 // Multiply-included message file, hence no include guard.
 
 #include <string>
 #include <vector>
 
@@ skipping 279 matching lines @@
                     ListValue /* response wrapper (see comment above) */,
                     std::string /* error */)
 
 // This message is optionally routed.  If used as a control message, it
 // will call a javascript function in every registered context in the
 // target process.  If routed, it will be restricted to the contexts that
 // are part of the target RenderView.
 // If |extension_id| is non-empty, the function will be invoked only in
 // contexts owned by the extension. |args| is a list of primitive Value types
 // that are passed to the function.
-IPC_MESSAGE_ROUTED5(ExtensionMsg_MessageInvoke,
+IPC_MESSAGE_ROUTED4(ExtensionMsg_MessageInvoke,
                     std::string /* extension_id */,
                     std::string /* function_name */,
                     ListValue /* args */,
-                    GURL /* event URL */,
                     bool /* delivered as part of a user gesture */)
 
 // Tell the renderer process all known extension function names.
 IPC_MESSAGE_CONTROL1(ExtensionMsg_SetFunctionNames,
                      std::vector<std::string>)
 
 // Marks an extension as 'active' in an extension process. 'Active' extensions
 // have more privileges than other extension content that might end up running
 // in the process (e.g. because of iframes or content scripts).
 IPC_MESSAGE_CONTROL1(ExtensionMsg_ActivateExtension,
@@ skipping 321 matching lines @@
 // Notifies the browser process that a tab has started or stopped matching
 // certain conditions.  This message is sent in response to several events:
 //
 // * ExtensionMsg_WatchPages was received, updating the set of conditions.
 // * A new page is loaded.  This will be sent after ViewHostMsg_FrameNavigate.
 //   Currently this only fires for the main frame.
 // * Something changed on an existing frame causing the set of matching searches
 //   to change.
 IPC_MESSAGE_ROUTED1(ExtensionHostMsg_OnWatchedPageChange,
                     std::vector<std::string> /* Matching CSS selectors */)