[Mac] Avoid "adding unknown subview" warning.

chrome/browser/ui/cocoa/framed_browser_window.h

Index: chrome/browser/ui/cocoa/framed_browser_window.h
diff --git a/chrome/browser/ui/cocoa/framed_browser_window.h b/chrome/browser/ui/cocoa/framed_browser_window.h
index d435422f009773eba4e4990122837b648454a123..04aae8489de529b6d571c4e6e625b1092a73e6cf 100644
--- a/chrome/browser/ui/cocoa/framed_browser_window.h
+++ b/chrome/browser/ui/cocoa/framed_browser_window.h
@@ -21,7 +21,7 @@ const NSInteger kFramedWindowButtonsWithoutTabStripOffsetFromLeft = 8;
 
 // The amount of window background image that is painted at the top of the
 // window, so that it shows behind the tap strip area.
-const CGFloat kBrowserFrameViewPaintHeight = 60.0;
+const CGFloat kBrowserFrameViewPaintHeight = 37.0;
 
 // Cocoa class representing a framed browser window.
 // We need to override NSWindow with our own class since we need access to all