Add -[NSView(CrDebugging) cr_recursiveDescription].

ui/base/cocoa/view_description.h

Index: ui/base/cocoa/view_description.h
diff --git a/ui/base/cocoa/view_description.h b/ui/base/cocoa/view_description.h
new file mode 100644
index 0000000000000000000000000000000000000000..727ad15db0a68e1b64e0e9120e473182fac92d9a
--- /dev/null
+++ b/ui/base/cocoa/view_description.h
@@ -0,0 +1,21 @@
+// Copyright (c) 2013 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 UI_BASE_COCOA_VIEW_DESCRIPTION_H_
+#define UI_BASE_COCOA_VIEW_DESCRIPTION_H_
+
+#import <Cocoa/Cocoa.h>
+
+#if !NDEBUG
+
+@interface NSView (CrDebugging)
+
+// Returns a description of all the subviews and each's frame for debugging.
+- (NSString*)cr_recursiveDescription;
+
+@end
+
+#endif  // !NDEBUG
+
+#endif  // UI_BASE_COCOA_VIEW_DESCRIPTION_H_