[regexp] implement case-insensitive unicode regexps.

src/regexp/regexp-macro-assembler-irregexp.h

Index: src/regexp/regexp-macro-assembler-irregexp.h
diff --git a/src/regexp/regexp-macro-assembler-irregexp.h b/src/regexp/regexp-macro-assembler-irregexp.h
index 204f7e24cbed71a53ecadfae07bd3411e9782162..dad2e9ac73da662d7fa689f1ca4d2a704679ac64 100644
--- a/src/regexp/regexp-macro-assembler-irregexp.h
+++ b/src/regexp/regexp-macro-assembler-irregexp.h
@@ -82,16 +82,10 @@ class RegExpMacroAssemblerIrregexp: public RegExpMacroAssembler {
                                         uc16 to,
                                         Label* on_not_in_range);
   virtual void CheckBitInTable(Handle<ByteArray> table, Label* on_bit_set);
-  virtual void CheckPosition(int cp_offset, Label* on_outside_input) {
-    LoadCurrentCharacter(cp_offset, on_outside_input, true);
-  }
-  virtual bool CheckSpecialCharacterClass(uc16 type, Label* on_no_match) {
-    return false;  // No custom support for character classes.
-  }
   virtual void CheckNotBackReference(int start_reg, bool read_backward,
                                      Label* on_no_match);
   virtual void CheckNotBackReferenceIgnoreCase(int start_reg,
-                                               bool read_backward,
+                                               bool read_backward, bool unicode,
                                                Label* on_no_match);
   virtual void IfRegisterLT(int register_index, int comparand, Label* if_lt);
   virtual void IfRegisterGE(int register_index, int comparand, Label* if_ge);