[regexp] back refs must not start/end in the middle of a surrogate pair

src/regexp/jsregexp.h

Index: src/regexp/jsregexp.h
diff --git a/src/regexp/jsregexp.h b/src/regexp/jsregexp.h
index c071fb3f6526743b62324770e47c8812f84caed6..d26feeb36303ef89c72b2e5aef10fdcec18a6b70 100644
--- a/src/regexp/jsregexp.h
+++ b/src/regexp/jsregexp.h
@@ -8,6 +8,7 @@
 #include "src/allocation.h"
 #include "src/assembler.h"
 #include "src/regexp/regexp-ast.h"
+#include "src/regexp/regexp-macro-assembler.h"
 
 namespace v8 {
 namespace internal {
@@ -19,15 +20,6 @@ class RegExpNode;
 class RegExpTree;
 class BoyerMooreLookahead;
 
-
-static const uc32 kLeadSurrogateStart = 0xd800;
-static const uc32 kLeadSurrogateEnd = 0xdbff;
-static const uc32 kTrailSurrogateStart = 0xdc00;
-static const uc32 kTrailSurrogateEnd = 0xdfff;
-static const uc32 kNonBmpStart = 0x10000;
-static const uc32 kNonBmpEnd = 0x10ffff;
-
-
 class RegExpImpl {
  public:
   // Whether V8 is compiled with native regexp support or not.