Remove redundant casts, use NGLayoutInputNode base functions everywhere

third_party/WebKit/Source/core/layout/ng/ng_break_token.h

Index: third_party/WebKit/Source/core/layout/ng/ng_break_token.h
diff --git a/third_party/WebKit/Source/core/layout/ng/ng_break_token.h b/third_party/WebKit/Source/core/layout/ng/ng_break_token.h
index ae486ff8763957c0c76a1e0757207e501cac135a..4b0b0e2973159e9a64aeb16dfea63bf2c3bf9057 100644
--- a/third_party/WebKit/Source/core/layout/ng/ng_break_token.h
+++ b/third_party/WebKit/Source/core/layout/ng/ng_break_token.h
@@ -38,6 +38,9 @@ class CORE_EXPORT NGBreakToken : public RefCounted<NGBreakToken> {
   enum NGBreakTokenType { kBlockBreakToken, kInlineBreakToken };
   NGBreakTokenType Type() const { return static_cast<NGBreakTokenType>(type_); }
 
+  bool IsBlockType() const { return Type() == kBlockBreakToken; }
+  bool IsInlineType() const { return Type() == kInlineBreakToken; }
+
   enum NGBreakTokenStatus { kUnfinished, kFinished };
 
   // Whether the layout node cannot produce any more fragments.