LiveEdit: implement frame dropping

src/x64/debug-x64.cc

Index: src/x64/debug-x64.cc
diff --git a/src/x64/debug-x64.cc b/src/x64/debug-x64.cc
index 261b16c0196054eee6624538cb961b068aeda844..5470912a3def49b00105f41006a5fbd5759d7d55 100644
--- a/src/x64/debug-x64.cc
+++ b/src/x64/debug-x64.cc
@@ -177,9 +177,24 @@ void Debug::GenerateStubNoRegistersDebugBreak(MacroAssembler* masm) {
 }
 
 
+void Debug::GeneratePlainReturnLiveEdit(MacroAssembler* masm) {
+  masm->Abort("LiveEdit frame dropping is not supported on x64");
+}
+
+void Debug::GenerateFrameDropperLiveEdit(MacroAssembler* masm) {
+  masm->Abort("LiveEdit frame dropping is not supported on x64");
+}
+
 #undef __
 
 
+void Debug::SetUpFrameDropperFrame(StackFrame* bottom_js_frame,
+                                   Handle<Code> code) {
+  UNREACHABLE();
+}
+const int Debug::kFrameDropperFrameSize = -1;
+
+
 void BreakLocationIterator::ClearDebugBreakAtReturn() {
   rinfo()->PatchCode(original_rinfo()->pc(),
                      Assembler::kJSReturnSequenceLength);