LiveEdit: implement frame dropping

src/builtins.cc

Index: src/builtins.cc
diff --git a/src/builtins.cc b/src/builtins.cc
index 69f6413108b8907d58b4bf818d2ef9f6a729a5b3..767820acb8cccba53a88ea01fe05ef90eed3a5c0 100644
--- a/src/builtins.cc
+++ b/src/builtins.cc
@@ -1392,6 +1392,14 @@ static void Generate_Return_DebugBreak(MacroAssembler* masm) {
 static void Generate_StubNoRegisters_DebugBreak(MacroAssembler* masm) {
   Debug::GenerateStubNoRegistersDebugBreak(masm);
 }
+
+static void Generate_PlainReturn_LiveEdit(MacroAssembler* masm) {
+  Debug::GeneratePlainReturnLiveEdit(masm);
+}
+
+static void Generate_FrameDropper_LiveEdit(MacroAssembler* masm) {
+  Debug::GenerateFrameDropperLiveEdit(masm);
+}
 #endif
 
 Object* Builtins::builtins_[builtin_count] = { NULL, };