Use finite-length end-anchored regexps to reduce part of regexp that is searched.

src/regexp-macro-assembler-tracer.h

Index: src/regexp-macro-assembler-tracer.h
diff --git a/src/regexp-macro-assembler-tracer.h b/src/regexp-macro-assembler-tracer.h
index 9608f9e16e1c808be69716b1069c6fa6c5b80828..6a8f4d47f8a382a6de46c3d8fa04d3c6943c35b9 100644
--- a/src/regexp-macro-assembler-tracer.h
+++ b/src/regexp-macro-assembler-tracer.h
@@ -89,6 +89,7 @@ class RegExpMacroAssemblerTracer: public RegExpMacroAssembler {
                             StackCheckFlag check_stack_limit);
   virtual void ReadCurrentPositionFromRegister(int reg);
   virtual void ReadStackPointerFromRegister(int reg);
+  virtual void SetCurrentPositionFromEnd(int by);
   virtual void SetRegister(int register_index, int to);
   virtual void Succeed();
   virtual void WriteCurrentPositionToRegister(int reg, int cp_offset);