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

src/mips/macro-assembler-mips.cc

Index: src/mips/macro-assembler-mips.cc
diff --git a/src/mips/macro-assembler-mips.cc b/src/mips/macro-assembler-mips.cc
index 95aa8e4cd47332531da0b7b88957612642343dca..7297fee69835ba961654cdf5ddf178d80a41a2a4 100644
--- a/src/mips/macro-assembler-mips.cc
+++ b/src/mips/macro-assembler-mips.cc
@@ -3885,6 +3885,16 @@
   push(at);
 }
 
+
+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 =