Move ExitFrame::ComputeStackPointer from frames-<arch>.cc to frames.cc

src/x64/frames-x64.cc

Index: src/x64/frames-x64.cc
diff --git a/src/x64/frames-x64.cc b/src/x64/frames-x64.cc
index a811a34ba963f0c81409fb2e563c92ac9be785da..21cb79c7402c1bb31635834d1a96265c69e07cb1 100644
--- a/src/x64/frames-x64.cc
+++ b/src/x64/frames-x64.cc
@@ -32,17 +32,12 @@
 #include "assembler.h"
 #include "assembler-x64.h"
 #include "assembler-x64-inl.h"
-#include "frames-inl.h"
+#include "frames.h"
 
 namespace v8 {
 namespace internal {
 
 
-Address ExitFrame::ComputeStackPointer(Address fp) {
-  return Memory::Address_at(fp + ExitFrameConstants::kSPOffset);
-}
-
-
 Register JavaScriptFrame::fp_register() { return rbp; }
 Register JavaScriptFrame::context_register() { return rsi; }