Finish implementing lazy deoptimization (ia32, x64). Ran tests with --deoptimize-alot.

runtime/vm/instructions_x64.h

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 // Classes that describe assembly patterns as used by inline caches.
 
 #ifndef VM_INSTRUCTIONS_X64_H_
 #define VM_INSTRUCTIONS_X64_H_
 
 #ifndef VM_INSTRUCTIONS_H_
 #error Do not include instructions_ia32.h directly; use instructions.h instead.
@@ skipping 79 matching lines @@
     return kLengthInBytes;
   }
 
  private:
   virtual const int* pattern() const;
 
   DISALLOW_COPY_AND_ASSIGN(JumpPattern);
 };
 
 
+// 5 byte call instruction.
+class ShortCallPattern : public InstructionPattern {
+ public:
+  explicit ShortCallPattern(uword pc) : InstructionPattern(pc) {}
+  static int InstructionLength() {
+    return kLengthInBytes;
+  }
+
+  virtual int pattern_length_in_bytes() const {
+    return kLengthInBytes;
+  }
+
+  void SetTargetAddress(uword new_target) const;
+
+ private:
+  static const int kLengthInBytes = 5;
+  virtual const int* pattern() const;
+
+  DISALLOW_COPY_AND_ASSIGN(ShortCallPattern);
+};
+
+
 }  // namespace dart
 
 #endif  // VM_INSTRUCTIONS_X64_H_