Recognize standard character classes and implement more efficient matchers.

src/regexp-macro-assembler.h

Index: src/regexp-macro-assembler.h
diff --git a/src/regexp-macro-assembler.h b/src/regexp-macro-assembler.h
index b9fbacaed425bfd3105d43daeea3d2c5766b7685..9d3ce5fd8c69dcf8d94ba558acbc87f7ad7831c1 100644
--- a/src/regexp-macro-assembler.h
+++ b/src/regexp-macro-assembler.h
@@ -99,6 +99,16 @@ class RegExpMacroAssembler {
   virtual void CheckNotRegistersEqual(int reg1,
                                       int reg2,
                                       Label* on_not_equal) = 0;
+  // Check whether a standard/default character class matches the current
+  // character. Returns false if the type of special character class does
+  // not have custom support.
+  // May clobber the current loaded character.
+  virtual bool CheckSpecialCharacterClass(uc16 type,
+                                          int cp_offset,
+                                          bool check_offset,
+                                          Label* on_no_match) {
+    return false;
+  }
   // Dispatch after looking the current character up in a byte map.  The
   // destinations vector has up to 256 labels.
   virtual void DispatchByteMap(