Remove -internals-media-controls-cast-button as web exposed CSS selector.

third_party/WebKit/Source/core/css/CSSSelector.cpp

 /*
  * Copyright (C) 1999-2003 Lars Knoll (knoll@kde.org)
  *               1999 Waldo Bastian (bastian@kde.org)
  *               2001 Andreas Schlapbach (schlpbch@iam.unibe.ch)
  *               2001-2003 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2002, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights
  * reserved.
  * Copyright (C) 2008 David Smith (catfish.man@gmail.com)
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
@@ skipping 269 matching lines @@
 // offset into a string buffer and making the bit fields smaller but
 // that could not be maintained by hand.
 struct NameToPseudoStruct {
   const char* string;
   unsigned type : 8;
 };
 
 // These tables should be kept sorted.
 const static NameToPseudoStruct pseudoTypeWithoutArgumentsMap[] = {
     {"-internal-list-box", CSSSelector::PseudoListBox},
-    {"-internal-media-controls-cast-button",
-     CSSSelector::PseudoWebKitCustomElement},
     {"-internal-media-controls-overlay-cast-button",
      CSSSelector::PseudoWebKitCustomElement},
     {"-internal-media-controls-text-track-list",
      CSSSelector::PseudoWebKitCustomElement},
     {"-internal-media-controls-text-track-list-item",
      CSSSelector::PseudoWebKitCustomElement},
     {"-internal-media-controls-text-track-list-item-input",
      CSSSelector::PseudoWebKitCustomElement},
     {"-internal-media-controls-text-track-list-kind-captions",
      CSSSelector::PseudoWebKitCustomElement},
@@ skipping 712 matching lines @@
     if (count < nthBValue())
       return false;
     return (count - nthBValue()) % nthAValue() == 0;
   }
   if (count > nthBValue())
     return false;
   return (nthBValue() - count) % (-nthAValue()) == 0;
 }
 
 }  // namespace blink