Revert "Lazy deopt without code patching."

runtime/vm/instructions_x64.cc

Index: runtime/vm/instructions_x64.cc
diff --git a/runtime/vm/instructions_x64.cc b/runtime/vm/instructions_x64.cc
index fe0c6ef3af6ec48f96fb93cc1136b713a5cf7636..950fd1676b57f6f048293c1524479c20397ea843 100644
--- a/runtime/vm/instructions_x64.cc
+++ b/runtime/vm/instructions_x64.cc
@@ -12,6 +12,13 @@
 
 namespace dart {
 
+void ShortCallPattern::SetTargetAddress(uword target) const {
+  ASSERT(IsValid());
+  *reinterpret_cast<uint32_t*>(start() + 1) = target - start() - kLengthInBytes;
+  CPU::FlushICache(start() + 1, kWordSize);
+}
+
+
 bool DecodeLoadObjectFromPoolOrThread(uword pc,
                                       const Code& code,
                                       Object* obj) {