mac: Let Carbon plugin stuff buid with the 10.7 SDK

content/plugin/plugin_interpose_util_mac.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.
 
 #ifndef CONTENT_PLUGIN_PLUGIN_INTERPOSE_UTIL_MAC_H_
 #define CONTENT_PLUGIN_PLUGIN_INTERPOSE_UTIL_MAC_H_
 
 #include <Carbon/Carbon.h>
 
 #import "base/basictypes.h"
 
+typedef struct Cursor Cursor;
+
 // This is really a WebPluginDelegateImpl, but that class is private to the
 // framework, and these functions are called from a dylib.
 typedef void* OpaquePluginRef;
 
 namespace mac_plugin_interposing {
 
 // Swizzles methods we need to watch in order to manage process and window
 // focus correctly.
 void SetUpCocoaInterposing();
 
@@ skipping 25 matching lines @@
 // Sends a message to the plugin that a cursor was set.
 void NotifyPluginOfSetCursor(OpaquePluginRef delegate,
                              const Cursor* cursor);
 
 // Returns true if the window containing the given plugin delegate is focused.
 bool GetPluginWindowHasFocus(const OpaquePluginRef delegate);
 
 }  // namespace MacPluginInterpose
 
 #endif  // CONTENT_PLUGIN_PLUGIN_INTERPOSE_UTIL_MAC_H_