Refactoring various pieces of post interceptor caching.

src/x64/macro-assembler-x64.h

Index: src/x64/macro-assembler-x64.h
diff --git a/src/x64/macro-assembler-x64.h b/src/x64/macro-assembler-x64.h
index c11902886c55cf05c4629b25b8ba2911b38d79cf..2cf163a707ff5e9c0c42aa0075c5a8878cc6677a 100644
--- a/src/x64/macro-assembler-x64.h
+++ b/src/x64/macro-assembler-x64.h
@@ -149,6 +149,9 @@ class MacroAssembler: public Assembler {
                       const ParameterCount& actual,
                       InvokeFlag flag);
 
+  void InvokeFunction(JSFunction* function,
+                      const ParameterCount& actual);
+
   // Invoke specified builtin JavaScript function. Adds an entry to
   // the unresolved list if the name does not resolve.
   void InvokeBuiltin(Builtins::JavaScript id, InvokeFlag flag);
@@ -644,6 +647,10 @@ class MacroAssembler: public Assembler {
   // Convenience function: Same as above, but takes the fid instead.
   void CallRuntime(Runtime::FunctionId id, int num_arguments);
 
+  // Convenience function: call an external reference.
+  void CallExternalReference(const ExternalReference& ext,
+                             int num_arguments);
+
   // Tail call of a runtime routine (jump).
   // Like JumpToRuntime, but also takes care of passing the number
   // of arguments.