Revert of [debugger] do not predict step in target for liveedit.

src/debug/mips64/debug-mips64.cc

Index: src/debug/mips64/debug-mips64.cc
diff --git a/src/debug/mips64/debug-mips64.cc b/src/debug/mips64/debug-mips64.cc
index b1a4842f46aca8fb71889a3c7064d197d3f707c3..5c1bb3e963a8095e6b5e5aa39807bad2fcbf036c 100644
--- a/src/debug/mips64/debug-mips64.cc
+++ b/src/debug/mips64/debug-mips64.cc
@@ -111,16 +111,22 @@
 }
 
 
+void DebugCodegen::GeneratePlainReturnLiveEdit(MacroAssembler* masm) {
+  __ Ret();
+}
+
+
 void DebugCodegen::GenerateFrameDropperLiveEdit(MacroAssembler* masm) {
+  ExternalReference restarter_frame_function_slot =
+      ExternalReference::debug_restarter_frame_function_pointer_address(
+          masm->isolate());
+  __ li(at, Operand(restarter_frame_function_slot));
+  __ sw(zero_reg, MemOperand(at, 0));
+
   // We do not know our frame height, but set sp based on fp.
   __ Dsubu(sp, fp, Operand(kPointerSize));
 
-  __ Pop(a1);  // Function.
-
-  ParameterCount dummy(0);
-  __ FloodFunctionIfStepping(a1, no_reg, dummy, dummy);
-
-  __ Pop(ra, fp);  // Return address, Frame.
+  __ Pop(ra, fp, a1);  // Return address, Frame, Function.
 
   // Load context from the function.
   __ ld(cp, FieldMemOperand(a1, JSFunction::kContextOffset));