Revert of [debugger] remove debugger statement support from FCG/CS.

src/mips64/macro-assembler-mips64.cc

Index: src/mips64/macro-assembler-mips64.cc
diff --git a/src/mips64/macro-assembler-mips64.cc b/src/mips64/macro-assembler-mips64.cc
index c49793e4452748e03691ebbc90714a1cc78a2c75..686400a30ecfa612a98aab71e1338e291240e963 100644
--- a/src/mips64/macro-assembler-mips64.cc
+++ b/src/mips64/macro-assembler-mips64.cc
@@ -4040,6 +4040,16 @@
   or_(dst, dst, scratch);
 }
 
+
+void MacroAssembler::DebugBreak() {
+  PrepareCEntryArgs(0);
+  PrepareCEntryFunction(
+      ExternalReference(Runtime::kHandleDebuggerStatement, isolate()));
+  CEntryStub ces(isolate(), 1);
+  DCHECK(AllowThisStubCall(&ces));
+  Call(ces.GetCode(), RelocInfo::DEBUGGER_STATEMENT);
+}
+
 void MacroAssembler::MaybeDropFrames() {
   // Check whether we need to drop frames to restart a function on the stack.
   ExternalReference restart_fp =