[Mac] Placate Clang's (pedantic) warning about CrTrackingArea's initializer.

chrome/browser/ui/cocoa/tracking_area.mm

 // 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.
 
 #import "chrome/browser/ui/cocoa/tracking_area.h"
 
 #include "base/logging.h"
 
 // NSTrackingArea does not retain its |owner| so CrTrackingArea wraps the real
 // owner in this proxy, which can stop forwarding messages to the owner when
@@ skipping 51 matching lines @@
 @interface CrTrackingArea (Private)
 - (void)windowWillClose:(NSNotification*)notif;
 @end
 
 ////////////////////////////////////////////////////////////////////////////////
 
 @implementation CrTrackingArea
 
 - (id)initWithRect:(NSRect)rect
            options:(NSTrackingAreaOptions)options
-             owner:(id)owner
+      proxiedOwner:(id)owner
           userInfo:(NSDictionary*)userInfo {
   scoped_nsobject<CrTrackingAreaOwnerProxy> ownerProxy(
       [[CrTrackingAreaOwnerProxy alloc] initWithOwner:owner]);
   if ((self = static_cast<id>([super initWithRect:rect

[Nico, 2011/02/15 13:57:51]

you could have a TODO to remove this static_cast as well once we're on the 10.6
sdk

                                           options:options
                                             owner:ownerProxy.get()
                                          userInfo:userInfo]))) {
     ownerProxy_.swap(ownerProxy);
   }
   return self;
 }
 
+- (NSTrackingArea*)initWithRect:(NSRect)rect
+                        options:(NSTrackingAreaOptions)options
+                          owner:(id)owner
+                       userInfo:(NSDictionary*)userInfo {
+  [NSException raise:@"org.chromium.CrTrackingArea"
+      format:@"Cannot init a CrTrackingArea with NSTrackingArea's initializer"];
+  return nil;
+}
+
 - (void)dealloc {
   [[NSNotificationCenter defaultCenter] removeObserver:self];
   [super dealloc];
 }
 
 - (void)clearOwner {
   [ownerProxy_ setAlive:NO];
 }
 
 - (void)clearOwnerWhenWindowWillClose:(NSWindow*)window {
   DCHECK(window);
   NSNotificationCenter* center = [NSNotificationCenter defaultCenter];
   [center addObserver:self
              selector:@selector(windowWillClose:)
                  name:NSWindowWillCloseNotification
                object:window];
 }
 
 - (void)windowWillClose:(NSNotification*)notif {
   [self clearOwner];
 }
 
 @end