Clamp Mac theme painting to reasonable large bounds.

third_party/WebKit/Source/core/layout/LayoutThemeMac.mm

 /*
  * Copyright (C) 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Google, Inc.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 14 matching lines @@
 #import "core/fileapi/FileList.h"
 #import "core/layout/LayoutProgress.h"
 #import "core/layout/LayoutView.h"
 #import "core/paint/MediaControlsPainter.h"
 #import "core/style/ShadowList.h"
 #import "platform/LayoutTestSupport.h"
 #import "platform/PlatformResourceLoader.h"
 #import "platform/Theme.h"
 #import "platform/graphics/BitmapImage.h"
 #import "platform/mac/ColorMac.h"
-#import "platform/mac/LocalCurrentGraphicsContext.h"
 #import "platform/mac/ThemeMac.h"
 #import "platform/mac/VersionUtilMac.h"
 #import "platform/mac/WebCoreNSCellExtras.h"
 #import "platform/text/PlatformLocale.h"
 #import "platform/text/StringTruncator.h"
 #import <AvailabilityMacros.h>
 #import <Carbon/Carbon.h>
 #import <Cocoa/Cocoa.h>
 #import <math.h>
 
@@ skipping 1059 matching lines @@
 
 bool LayoutThemeMac::shouldUseFallbackTheme(const ComputedStyle& style) const
 {
     ControlPart part = style.appearance();
     if (part == CheckboxPart || part == RadioPart)
         return style.effectiveZoom() != 1;
     return false;
 }
 
 } // namespace blink